-
Notifications
You must be signed in to change notification settings - Fork 0
/
event.go
60 lines (52 loc) · 808 Bytes
/
event.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
package missinggo
import "sync"
type Event struct {
mu sync.Mutex
ch chan struct{}
closed bool
}
func (me *Event) lazyInit() {
if me.ch == nil {
me.ch = make(chan struct{})
}
}
func (me *Event) C() <-chan struct{} {
me.mu.Lock()
defer me.mu.Unlock()
me.lazyInit()
return me.ch
}
func (me *Event) Clear() {
me.mu.Lock()
defer me.mu.Unlock()
me.lazyInit()
if !me.closed {
return
}
me.ch = make(chan struct{})
me.closed = false
}
func (me *Event) Set() (first bool) {
me.mu.Lock()
defer me.mu.Unlock()
me.lazyInit()
if me.closed {
return false
}
close(me.ch)
me.closed = true
return true
}
func (me *Event) IsSet() bool {
me.mu.Lock()
defer me.mu.Unlock()
select {
case <-me.ch:
return true
default:
return false
}
}
func (me *Event) Wait() {
<-me.C()
}