-
Notifications
You must be signed in to change notification settings - Fork 307
/
waitgroup.go
61 lines (53 loc) · 888 Bytes
/
waitgroup.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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
package misc
import (
"sync"
)
type WaitGroup struct {
wg sync.WaitGroup
errChan chan error
doneChan chan bool
}
func NewWaitGroup() *WaitGroup {
return &WaitGroup{
wg: sync.WaitGroup{},
errChan: make(chan error),
doneChan: make(chan bool, 1),
}
}
func (wg *WaitGroup) Add(delta int) {
wg.wg.Add(delta)
}
func (wg *WaitGroup) Done() {
wg.wg.Done()
}
func (wg *WaitGroup) Err(err error) {
wg.errChan <- err
wg.wg.Done()
}
func (wg *WaitGroup) Wait() error {
go func() {
wg.wg.Wait()
wg.doneChan <- true
}()
select {
case err := <-wg.errChan:
return err
case <-wg.doneChan:
return nil
}
}
func (wg *WaitGroup) WaitForAll() []error {
var errList []error
go func() {
wg.wg.Wait()
wg.doneChan <- true
}()
for {
select {
case err := <-wg.errChan:
errList = append(errList, err)
case <-wg.doneChan:
return errList
}
}
}