mirror of https://github.com/v2ray/v2ray-core
68 lines
1.1 KiB
Go
68 lines
1.1 KiB
Go
package signal
|
|
|
|
import (
|
|
"context"
|
|
"time"
|
|
)
|
|
|
|
type ActivityUpdater interface {
|
|
Update()
|
|
}
|
|
|
|
type ActivityTimer struct {
|
|
updated chan bool
|
|
timeout chan time.Duration
|
|
ctx context.Context
|
|
cancel context.CancelFunc
|
|
}
|
|
|
|
func (t *ActivityTimer) Update() {
|
|
select {
|
|
case t.updated <- true:
|
|
default:
|
|
}
|
|
}
|
|
|
|
func (t *ActivityTimer) SetTimeout(timeout time.Duration) {
|
|
t.timeout <- timeout
|
|
}
|
|
|
|
func (t *ActivityTimer) run() {
|
|
ticker := time.NewTicker(<-t.timeout)
|
|
defer func() {
|
|
ticker.Stop()
|
|
}()
|
|
|
|
for {
|
|
select {
|
|
case <-ticker.C:
|
|
case <-t.ctx.Done():
|
|
return
|
|
case timeout := <-t.timeout:
|
|
ticker.Stop()
|
|
ticker = time.NewTicker(timeout)
|
|
}
|
|
|
|
select {
|
|
case <-t.updated:
|
|
// Updated keep waiting.
|
|
default:
|
|
t.cancel()
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func CancelAfterInactivity(ctx context.Context, timeout time.Duration) (context.Context, *ActivityTimer) {
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
timer := &ActivityTimer{
|
|
ctx: ctx,
|
|
cancel: cancel,
|
|
timeout: make(chan time.Duration, 1),
|
|
updated: make(chan bool, 1),
|
|
}
|
|
timer.timeout <- timeout
|
|
go timer.run()
|
|
return ctx, timer
|
|
}
|