}

// partialUnswept returns the spanSet which holds partially-filled
// unswept spans for this sweepgen.
func (c *mcentral) partialUnswept(sweepgen uint32) *spanSet {
	return &c.partial[1-sweepgen/2%2]
}

// partialSwept returns the spanSet which holds partially-filled
// swept spans for this sweepgen.
func (c *mcentral) partialSwept(sweepgen uint32) *spanSet {
	return &c.partial[sweepgen/2%2]

	for sc := sweep.centralIndex.load(); sc < numSweepClasses; sc++ {
		spc, full := sc.split()
		c := &h.central[spc].mcentral
		var s *mspan
		if full {
			s = c.fullUnswept(sg).pop()
		} else {
			s = c.partialUnswept(sg).pop()
		}
		if s != nil {
			// Write down that we found something so future sweepers
			// can start from here.
			sweep.centralIndex.update(sc)
			return s
		}
	}