github.com/fafucoder/cilium@v1.6.11/pkg/kvstore/watcher_cache.go (about)

     1  // Copyright 2018 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package kvstore
    16  
    17  type watchState struct {
    18  	deletionMark bool
    19  }
    20  
    21  type watcherCache map[string]watchState
    22  
    23  func (wc watcherCache) Exists(key []byte) bool {
    24  	if _, ok := wc[string(key)]; ok {
    25  		return true
    26  	}
    27  
    28  	return false
    29  }
    30  
    31  func (wc watcherCache) RemoveDeleted(f func(string)) {
    32  	for k, localKey := range wc {
    33  		if localKey.deletionMark {
    34  			f(k)
    35  			delete(wc, k)
    36  		}
    37  	}
    38  }
    39  
    40  func (wc watcherCache) MarkAllForDeletion() {
    41  	for k := range wc {
    42  		wc[k] = watchState{deletionMark: true}
    43  	}
    44  }
    45  
    46  func (wc watcherCache) MarkInUse(key []byte) {
    47  	wc[string(key)] = watchState{deletionMark: false}
    48  }
    49  
    50  func (wc watcherCache) RemoveKey(key []byte) {
    51  	delete(wc, string(key))
    52  }