# MPI_Type_get_contents

get type contents

## Synopsis

    int MPI_Type_get_contents(MPI_Datatype datatype, int max_integers,
                              int max_addresses, int max_large_counts,
                              int max_datatypes, int array_of_integers[],
                              MPI_Aint array_of_addresses[],
                              MPI_Count array_of_large_counts[],
                              MPI_Datatype array_of_datatypes[])

    int MPI_Type_get_contents_c(MPI_Datatype datatype, MPI_Count max_integers,
                                MPI_Count max_addresses, MPI_Count max_large_counts,
                                MPI_Count max_datatypes, int array_of_integers[],
                                MPI_Aint array_of_addresses[],
                                MPI_Count array_of_large_counts[],
                                MPI_Datatype array_of_datatypes[])

## Input 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_large_counts
  number of elements in array_of_large_counts (non-negative integer)
max_datatypes
  number of elements in array_of_datatypes (non-negative integer)

## Output Parameters

array_of_integers
  contains integer arguments used in constructing datatype (integer)
array_of_addresses
  contains address arguments used in constructing datatype (integer)
array_of_large_counts
  contains large count arguments used in constructing datatype (integer)
array_of_datatypes
  contains datatype arguments used in constructing datatype (handle)

## 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.

## Errors

All MPI routines (except `MPI_Wtime` and `MPI_Wtick`) return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with `MPI_Comm_set_errhandler` (for communicators), `MPI_File_set_errhandler` (for files), and `MPI_Win_set_errhandler` (for RMA windows). The MPI-1 routine `MPI_Errhandler_set` may be used but its use is deprecated. The predefined error handler `MPI_ERRORS_RETURN` may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error; however, MPI implementations will attempt to continue whenever possible.

MPI_SUCCESS
  No error; MPI routine completed successfully.

MPI_ERR_ARG
  Invalid argument. Some argument is invalid and is not identified by a specific error class (e.g., `MPI_ERR_RANK`).

MPI_ERR_TYPE
  Invalid datatype argument. Additionally, this error can occur if an uncommitted MPI_Datatype (see `MPI_Type_commit`) is used in a communication call.

MPI_ERR_OTHER
  Other error; use `MPI_Error_string` to get more information about this error code.