mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package garbagecollector
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import (
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"sync"
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"github.com/golang/groupcache/lru"
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"k8s.io/apimachinery/pkg/types"
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)
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// UIDCache is an LRU cache for uid.
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type UIDCache struct {
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mutex sync.Mutex
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cache *lru.Cache
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}
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// NewUIDCache returns a UIDCache.
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func NewUIDCache(maxCacheEntries int) *UIDCache {
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return &UIDCache{
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cache: lru.New(maxCacheEntries),
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}
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}
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// Add adds a uid to the cache.
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func (c *UIDCache) Add(uid types.UID) {
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c.mutex.Lock()
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defer c.mutex.Unlock()
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c.cache.Add(uid, nil)
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}
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// Has returns if a uid is in the cache.
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func (c *UIDCache) Has(uid types.UID) bool {
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c.mutex.Lock()
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defer c.mutex.Unlock()
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_, found := c.cache.Get(uid)
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return found
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}
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