mirror of
https://github.com/cubefs/cubefs.git
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74 lines
1.3 KiB
Go
74 lines
1.3 KiB
Go
// Copyright 2018 The CubeFS Authors.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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
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// implied. See the License for the specific language governing
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// permissions and limitations under the License.
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package util
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import "sync"
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type (
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Null struct{}
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Set struct {
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sync.RWMutex
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m map[string]Null
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}
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)
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func NewSet() *Set {
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return &Set{
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m: map[string]Null{},
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}
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}
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func (s *Set) Add(val string) {
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s.Lock()
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defer s.Unlock()
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s.m[val] = Null{}
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}
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func (s *Set) Remove(val string) {
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s.Lock()
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defer s.Unlock()
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delete(s.m, val)
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}
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func (s *Set) Has(key string) bool {
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s.RLock()
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defer s.RUnlock()
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_, ok := s.m[key]
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return ok
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}
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func (s *Set) Len() int {
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s.RLock()
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defer s.RUnlock()
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return len(s.m)
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}
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func (s *Set) Clear() {
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s.Lock()
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defer s.Unlock()
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s.m = make(map[string]Null)
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}
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func (s *Set) Range(fun func(key interface{}) bool) {
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s.RLock()
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defer s.RUnlock()
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for k := range s.m {
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if !fun(k) {
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return
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}
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}
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}
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