Method addIfNotPresentLocked

tools/cache/heap.go:209–214

addIfNotPresentLocked assumes the lock is already held and adds the provided item to the queue if it does not already exist.

(key string, obj interface{})

// addIfNotPresentLocked assumes the lock is already held and adds the provided
// item to the queue if it does not already exist.
func (h *Heap) addIfNotPresentLocked(key string, obj interface{}) {
	if _, exists := h.data.items[key]; exists {
		return
	}
	heap.Push(h.data, &itemKeyValue{key, obj})
}

// Update is the same as Add in this implementation. When the item does not
// exist, it is added.