MPI_Initialized(3)                 Open MPI                 MPI_Initialized(3)



NAME
       MPI_Initialized - Indicates whether MPI_Init has been called.


SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Initialized(int *flag)


Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_INITIALIZED(FLAG, IERROR)
            LOGICAL   FLAG
            INTEGER   IERROR


C++ Syntax
       #include <mpi.h>
       bool Is_initialized()


OUTPUT PARAMETERS
       flag      Flag is true if MPI_Init has been called and false otherwise.

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       This routine may be used to determine whether MPI_Init has been called.
       It is the only routine that may be called before MPI_Init is called.


ERRORS
       Almost all MPI routines return an error value; C routines as the value
       of the function and Fortran routines in the last argument. C++
       functions do not return errors. If the default error handler is set to
       MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
       will be used to throw an MPI:Exception object.

       Before the error value is returned, the current MPI error handler is
       called. By default, this error handler aborts the MPI job, except for
       I/O function errors. The error handler may be changed with
       MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
       may be used to cause error values to be returned. Note that MPI does
       not guarantee that an MPI program can continue past an error.


SEE ALSO
       MPI_Init




1.4.1                            Jan 14, 2010               MPI_Initialized(3)
