int MPI_File_read_at(MPI_File fh, MPI_Offset offset, void *buf,
int count, MPI_Datatype datatype, MPI_Status *status)
- - file handle (handle)
- - file offset (nonnegative integer)
- - number of elements in buffer (nonnegative integer)
- datatype of each buffer element (handle)
- - initial address of buffer (choice)
- status object (Status)
NOTES FOR FORTRANAll 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.