Summary

A circular_linked_list is a linked structure where the last node points back to the head via a next_pointer. There is no null terminator. Starting at head, traversal loops until you return to head. Common operations are insertion and deletion at head or after a given node, updating pointers, and keeping the tail connected to head. It supports round_robin processing and repeated cycling. Time facts: search is O(n), insert after node is O(1), and space per node is O(1).