func()

in lru.go [187:201]

• 10 lines of code
• 2 McCabe index (conditional complexity)

func (lru *LRU[K, V]) setHead(pos uint32) {
	// Both calls to setHead() check beforehand that pos != lru.head.
	// So if you run into this situation, you likely use FreeLRU in a concurrent situation
	// without proper locking. It requires a write lock, even around Get().
	// But better use SyncedLRU or SharedLRU in such a case.
	if pos == lru.head {
		panic(pos)
	}

	lru.elements[pos].prev = lru.head
	lru.elements[pos].next = lru.elements[lru.head].next
	lru.elements[lru.elements[lru.head].next].prev = pos
	lru.elements[lru.head].next = pos
	lru.head = pos
}