PK_ERROR_code_t PK_imprint_r_f ( --- received arguments --- PK_imprint_r_t *const results ) This function frees the PK memory referenced by the structure. The function will free all the PK memory referenced by the results structure. Internally, the function will use the PK_MEMORY_free function to free all the memory. All the fields within the structure will be initialised before being returned by the function.