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MPI_Initialized.3.rst

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MPI_Initialized

:ref:`MPI_Initialized` |mdash| Checks whether MPI has been initialized

SYNTAX

C Syntax

#include <mpi.h>

int MPI_Initialized(int *flag)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_INITIALIZED(FLAG, IERROR)
     LOGICAL FLAG
     INTEGER IERROR

Fortran 2008 Syntax

USE mpi_f08
MPI_Initialized(flag, ierror)
     LOGICAL, INTENT(OUT) :: flag
     INTEGER, OPTIONAL, INTENT(OUT) :: ierror

OUTPUT PARAMETERS

  • flag: True if MPI has been initialized, and false otherwise (logical).
  • ierror: Fortran only: Error status (integer).

DESCRIPTION

This routine may be used to determine whether MPI has been initialized. It is one of a small number of routines that may be called before MPI is initialized and after MPI has been finalized (:ref:`MPI_Finalized` is another).

ERRORS

.. seealso::
   * :ref:`MPI_Init`
   * :ref:`MPI_Init_thread`
   * :ref:`MPI_Finalize`
   * :ref:`MPI_Finalized`