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utils.go
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utils.go
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package events
import (
teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
"sync"
)
type Callbacks = []func()
var eventsMap = map[Event]map[interface{}]Callbacks{} // event => map[event key][]callback
var locker = sync.Mutex{}
var eventKeyId = 0
func NewKey() interface{} {
locker.Lock()
defer locker.Unlock()
eventKeyId++
return eventKeyId
}
// On 增加事件回调
func On(event Event, callback func()) {
OnKey(event, nil, callback)
}
func OnEvents(events []Event, callback func()) {
for _, event := range events {
On(event, callback)
}
}
func OnClose(callback func()) {
On(EventQuit, callback)
On(EventTerminated, callback)
}
// OnKey 使用Key增加事件回调
func OnKey(event Event, key interface{}, callback func()) {
if key == nil {
key = NewKey()
}
locker.Lock()
defer locker.Unlock()
m, ok := eventsMap[event]
if !ok {
m = map[interface{}]Callbacks{}
eventsMap[event] = m
}
m[key] = append(m[key], callback)
}
// Remove 删除事件回调
func Remove(key interface{}) {
if key == nil {
return
}
locker.Lock()
for k, m := range eventsMap {
_, ok := m[key]
if ok {
delete(m, key)
eventsMap[k] = m
}
}
locker.Unlock()
}
// Notify 通知事件
func Notify(event Event) {
// 特殊事件
switch event {
case EventQuit:
teaconst.IsQuiting = true
case EventTerminated:
teaconst.IsQuiting = true
}
locker.Lock()
m := eventsMap[event]
locker.Unlock()
for _, callbacks := range m {
for _, callback := range callbacks {
callback()
}
}
}