/
closer.go
46 lines (39 loc) · 1.22 KB
/
closer.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
// Copyright 2021 hardcore-os Project Authors
//
// 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 utils
import "sync"
// Closer _用于资源回收的信号控制
type Closer struct {
waiting sync.WaitGroup
CloseSignal chan struct{}
}
// NewCloser _
func NewCloser() *Closer {
closer := &Closer{waiting: sync.WaitGroup{}}
closer.CloseSignal = make(chan struct{})
return closer
}
// Close 上游通知下游协程进行资源回收,并等待协程通知回收完毕
func (c *Closer) Close() {
close(c.CloseSignal)
c.waiting.Wait()
}
// Done 标示协程已经完成资源回收,通知上游正式关闭
func (c *Closer) Done() {
c.waiting.Done()
}
// Add 添加wait 计数
func (c *Closer) Add(n int) {
c.waiting.Add(n)
}