csr_destroy Subroutine

   SUBROUTINE csr_destroy(csr_mat)
      !! destroy a CSR matrix
      TYPE(csr_type), INTENT(INOUT)                      :: csr_mat

      CHARACTER(LEN=*), PARAMETER :: routineN = 'csr_destroy'
      INTEGER                                            :: handle
      TYPE(csr_mapping_data)                             :: map

      CALL timeset(routineN, handle)

      IF (.NOT. csr_mat%valid) &
         DBCSR_ABORT("CSR matrix must be created before destroying it.")

      IF (ASSOCIATED(csr_mat%rowptr_local)) DEALLOCATE (csr_mat%rowptr_local)
      IF (ASSOCIATED(csr_mat%nzerow_local)) DEALLOCATE (csr_mat%nzerow_local)
      IF (ASSOCIATED(csr_mat%colind_local)) DEALLOCATE (csr_mat%colind_local)

      IF (csr_mat%has_mapping) THEN
         map = csr_mat%dbcsr_mapping
         IF (ASSOCIATED(map%csr_to_brd_ind)) &
            DEALLOCATE (map%csr_to_brd_ind)
         IF (ASSOCIATED(map%brd_to_csr_ind)) &
            DEALLOCATE (map%brd_to_csr_ind)
         IF (ASSOCIATED(map%dbcsr_row_blk_size)) &
            DEALLOCATE (map%dbcsr_row_blk_size)
         IF (ASSOCIATED(map%dbcsr_col_blk_size)) &
            DEALLOCATE (map%dbcsr_col_blk_size)
         IF (ASSOCIATED(map%dbcsr_row_p)) &
            DEALLOCATE (map%dbcsr_row_p)
         IF (ASSOCIATED(map%dbcsr_col_i)) &
            DEALLOCATE (map%dbcsr_col_i)

         CALL dbcsr_release(map%brd_mat)
      END IF

      IF (ASSOCIATED(csr_mat%nzval_local%r_dp)) &
         DEALLOCATE (csr_mat%nzval_local%r_dp)
      IF (ASSOCIATED(csr_mat%nzval_local%r_sp)) &
         DEALLOCATE (csr_mat%nzval_local%r_sp)
      IF (ASSOCIATED(csr_mat%nzval_local%c_sp)) &
         DEALLOCATE (csr_mat%nzval_local%c_sp)
      IF (ASSOCIATED(csr_mat%nzval_local%c_dp)) &
         DEALLOCATE (csr_mat%nzval_local%c_dp)

      csr_mat%has_mapping = .FALSE.
      csr_mat%valid = .FALSE.
      csr_mat%dbcsr_mapping%has_dbcsr_block_data = .FALSE.
      csr_mat%has_indices = .FALSE.
      csr_mat%nzval_local%data_type = -1

      CALL timestop(handle)
   END SUBROUTINE csr_destroy