MPIO_Test - Test the completion of a nonblocking read or write

request
              - request object (handle)

       MPIO_Test -  Test the completion of a nonblocking read or write

       All  MPI  routines in Fortran (except for 'MPI_WTIME' and 'MPI_WTICK') have an additional argument 'ierr'
       at the end of the argument list.  'ierr' is an integer and has the same meaning as the  return  value  of
       the routine in C.  In Fortran, MPI routines are subroutines and are invoked with the 'call' statement.

       All MPI objects (e.g., 'MPI_Datatype', 'MPI_Comm', 'MPI_File') are of type 'INTEGER' in Fortran.

                                                    2/5/1998                                        MPIO_Test(3)

flag   - true if operation completed (logical)
       status - status object (Status)

       #include "mpi.h"
       int MPIO_Test(MPIO_Request *request, int *flag, MPI_Status *status)