MPI_Register_datarep - Register functions for user-defined data representations
int MPI_Register_datarep(ROMIO_CONST char *datarep,
MPI_Datarep_conversion_function * read_conversion_fn,
MPI_Datarep_conversion_function * write_conversion_fn,
MPI_Datarep_extent_function * dtype_file_extent_fn, void *extra_state)
- datarep
- - data representation name (string)
- read_conversion_fn
- - function invoked to convert from file representation to native
representation (function)
- write_conversion_fn
- - function invoked to convert from native representation to file
representation (function)
- dtype_file_extent_fn
- - function invoked to get the exted of a datatype as represented in the
file (function)
- extra_state
- - pointer to extra state that is passed to each of the three functions
This function allows the user to provide routines to convert data from an
external representation, used within a file, and the native representation,
used within the CPU. There is one predefined data representation,
external32 . Please consult the MPI-2 standard for details on this
function.
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 ) are
of type INTEGER in Fortran.