Retrieves the actual arguments used in the creation call for a datatype


#include "mpi.h"
int MPI_Type_get_contents(
        MPI_Datatype datatype, 
        int max_integers, 
        int max_addresses, 
        int max_datatypes, 
        int *array_of_integers, 
        MPI_Aint *array_of_addresses, 
        MPI_Datatype *array_of_datatypes)

Input Parameters

Output Parameters

datatype datatype to access (handle)
max_integers number of elements in array_of_integers (non-negative integer)
max_addresses number of elements in array_of_addresses (non-negative integer)
max_datatypes number of elements in array_of_datatypes (non-negative integer)
array_of_integers contains integer arguments used in constructing datatype (array of integers)
array_of_addresses contains address arguments used in constructing datatype (array of integers)
array_of_datatypes contains datatype arguments used in constructing datatype (array of handles)

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.