MPI_INITIALIZED, MPI_Initialized

Purpose

Determines whether MPI is initialized.

C synopsis

#include <mpi.h>
int MPI_Initialized(int *flag);

C++ synopsis

#include mpi.h
bool MPI::Is_initialized();

FORTRAN synopsis

include 'mpif.h' or use mpi
MPI_INITIALIZED(INTEGER FLAG,INTEGER IERROR)

Parameters

flag
     is true if MPI_INIT was called; otherwise is false.

IERROR
     is the FORTRAN return code. It is always the last argument.

Description

This subroutine determines if MPI is initialized. MPI_INITIALIZED and
MPI_GET_VERSION are the only MPI calls that can be made before MPI_INIT is
called.

Notes

Because it is erroneous to call MPI_INIT more than once per task, use
MPI_INITIALIZED if there is doubt as to the state of MPI.

Related information