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MPI_Info_get_nkeys.3.rst

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MPI_Info_get_nkeys

:ref:`MPI_Info_get_nkeys` - Gets the number of keys currently defined in an info object.

SYNTAX

C Syntax

#include <mpi.h>

int MPI_Info_get_nkeys(MPI_Info info, int *nkeys)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_INFO_GET_NKEYS(INFO, NKEYS, IERROR)
     INTEGER         INFO, NKEYS, IERROR

Fortran 2008 Syntax

USE mpi_f08
MPI_Info_get_nkeys(info, nkeys, ierror)
     TYPE(MPI_Info), INTENT(IN) :: info
     INTEGER, INTENT(OUT) :: nkeys
     INTEGER, OPTIONAL, INTENT(OUT) :: ierror

INPUT PARAMETER

  • info: Info object (handle).

OUTPUT PARAMETERS

  • nkeys: Number of defined keys (integer).
  • ierror: Fortran only: Error status (integer).

DESCRIPTION

:ref:`MPI_Info_get_nkeys` returns the number of currently defined keys in info.

ERRORS

.. seealso::
   * :ref:`MPI_Info_get`
   * :ref:`MPI_Info_get_nthkey`
   * :ref:`MPI_Info_get_valuelen`