Method isSingleNode

nocopy_linkbuffer.go:814–824

isSingleNode determines whether reading needs to cross nodes. isSingleNode will move b.read to latest non-empty node if there is a zero-size node Must require b.Len() > 0

(readN int)

// isSingleNode will move b.read to latest non-empty node if there is a zero-size node
// Must require b.Len() > 0
func (b *UnsafeLinkBuffer) isSingleNode(readN int) (single bool) {
	if readN <= 0 {
		return true
	}
	l := b.read.Len()
	for l == 0 && b.read != b.flush {
		b.read = b.read.next
		l = b.read.Len()
	}
	return l >= readN
}

// memorySize return the real memory size in bytes the LinkBuffer occupied
func (b *LinkBuffer) memorySize() (bytes int) {