Method canInsertBeforeHead

queue/bytes_queue.go:261–269

canInsertBeforeHead returns true if it's possible to insert an entry of size of need before the head of the queue

(need int)

// canInsertBeforeHead returns true if it's possible to insert an entry of size of need before the head of the queue
func (q *BytesQueue) canInsertBeforeHead(need int) bool {
	if q.full {
		return false
	}
	if q.tail >= q.head {
		return q.head-leftMarginIndex == need || q.head-leftMarginIndex >= need+minimumHeaderSize
	}
	return q.head-q.tail == need || q.head-q.tail >= need+minimumHeaderSize
}