flush_stacks Subroutine

   SUBROUTINE flush_stacks(this, left, right, purge)
      TYPE(dbcsr_mm_csr_type), INTENT(INOUT)             :: this
      TYPE(dbcsr_type), INTENT(IN)                       :: left, right
      LOGICAL, INTENT(IN), OPTIONAL                      :: purge

      INTEGER                                            :: i, min_fill, n_stacks
      INTEGER, DIMENSION(:, :), POINTER                  :: stack_data
      INTEGER, POINTER                                   :: stack_fillcount
      TYPE(stack_descriptor_type)                        :: stack_descr

      n_stacks = SIZE(this%stacks_data, 3)
      min_fill = SIZE(this%stacks_data, 2)*3/4 !TODO: play with this
      IF (PRESENT(purge)) THEN
         IF (purge) min_fill = 0
      END IF

      CALL dbcsr_mm_sched_begin_burst(this%sched)

      DO i = 1, n_stacks
         IF (this%stacks_fillcount(i) > min_fill) THEN
            stack_data => this%stacks_data(:, :, i)
            stack_fillcount => this%stacks_fillcount(i)
            stack_descr = this%stacks_descr(i)

            CALL dbcsr_mm_sched_process(this%sched, &
                                        left, right, &
                                        stack_data=stack_data, &
                                        stack_fillcount=stack_fillcount, &
                                        stack_descr=stack_descr)

            stack_fillcount = 0
         END IF
      END DO

      CALL dbcsr_mm_sched_end_burst()
   END SUBROUTINE flush_stacks