NewLockFreeQueue 创建无锁队列 Reference: https://www.sobyte.net/post/2021-07/implementing-lock-free-queues-with-go/.

Element is an element of a null terminated (non circular) intrusive doubly linked list that contains the key of the correspondent element in the ordered map too.

list represents a null terminated (non circular) intrusive doubly linked list.

LockFreeQueue 基于无锁队列实现,通过链表实现.