hugo/common/types/closer.go

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// Copyright 2024 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package types
import "sync"
type Closer interface {
Close() error
}
type CloseAdder interface {
Add(Closer)
}
type Closers struct {
mu sync.Mutex
cs []Closer
}
func (cs *Closers) Add(c Closer) {
cs.mu.Lock()
defer cs.mu.Unlock()
cs.cs = append(cs.cs, c)
}
func (cs *Closers) Close() error {
cs.mu.Lock()
defer cs.mu.Unlock()
for _, c := range cs.cs {
c.Close()
}
cs.cs = cs.cs[:0]
return nil
}