45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package op
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import "sync"
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type Canceler struct {
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lock sync.RWMutex
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done chan struct{}
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active bool
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}
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func NewCanceler() *Canceler {
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return &Canceler{
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done: make(chan struct{}),
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active: true,
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}
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}
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func (c *Canceler) Cancel() {
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c.lock.Lock()
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c.active = false
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c.lock.Unlock()
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close(c.done)
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}
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func (c *Canceler) Done() <-chan struct{} {
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return c.done
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}
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