Deallocation

A datatype object is deallocated by a call to MPI_TYPE_FREE.

MPI_TYPE_FREE(datatype)
  INOUT     datatype               datatype to be freed

MPI_TYPE_FREE(DATATYPE, IERROR)INTEGER DATATYPE, IERROR

MPI_TYPE_FREE marks the datatype object associated with datatype for deallocation and sets datatype to MPI_DATATYPE_NULL. MPI_DATATYPE_NULL Any communication that is currently using this datatype will complete normally. Derived datatypes that were defined from the freed datatype are not affected. derived datatype, destructor