forked from aceld/zinx
-
Notifications
You must be signed in to change notification settings - Fork 0
/
callbacks.go
57 lines (51 loc) · 1.12 KB
/
callbacks.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
package znet
type callbackCommon struct {
handler interface{}
key interface{}
call func()
next *callbackCommon
}
type callbacks struct {
first *callbackCommon
last *callbackCommon
}
func (t *callbacks) Add(handler, key interface{}, callback func()) {
if callback == nil {
return
}
newItem := &callbackCommon{handler, key, callback, nil}
if t.first == nil {
t.first = newItem
} else {
t.last.next = newItem
}
t.last = newItem
}
func (t *callbacks) Remove(handler, key interface{}) {
var prev *callbackCommon
for callback := t.first; callback != nil; prev, callback = callback, callback.next {
if callback.handler == handler && callback.key == key {
if t.first == callback {
t.first = callback.next
} else if prev != nil {
prev.next = callback.next
}
if t.last == callback {
t.last = prev
}
return
}
}
}
func (t *callbacks) Invoke() {
for callback := t.first; callback != nil; callback = callback.next {
callback.call()
}
}
func (t *callbacks) Count() int {
var count int
for callback := t.first; callback != nil; callback = callback.next {
count++
}
return count
}