MPI_Register_datarep(3) MPI MPI_Register_datarep(3)NAMEMPI_Register_datarep - Register functions for user-defined data rep‐
resentations
SYNOPSIS
int MPI_Register_datarep(MPICH2_CONST char *name,
MPI_Datarep_conversion_function *read_conv_fn,
MPI_Datarep_conversion_function *write_conv_fn,
MPI_Datarep_extent_function *extent_fn,
void *state)
INPUT PARAMETERS
name - data representation name (string)
read_conv_fn
- function invoked to convert from file representation to native
representation (function)
write_conv_fn
- function invoked to convert from native representation to file
representation (function)
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
NOTES
This function allows the user to provide routines to convert data from
an external representation, used within a file, and the native repre‐
sentation, used within the CPU. There is one predefined data represen‐
tation, external32 . Please consult the MPI-2 standard for details on
this function.
NOTES FOR FORTRAN
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.
LOCATION
mpi-io/register_datarep.c
7/3/2012 MPI_Register_datarep(3)
