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83 lines
1.3 KiB
83 lines
1.3 KiB
package signal
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import (
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"context"
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"sync"
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"time"
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"v2ray.com/core/common"
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"v2ray.com/core/common/task"
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)
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type ActivityUpdater interface {
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Update()
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}
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type ActivityTimer struct {
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sync.RWMutex
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updated chan struct{}
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checkTask *task.Periodic
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onTimeout func()
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}
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func (t *ActivityTimer) Update() {
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select {
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case t.updated <- struct{}{}:
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default:
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}
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}
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func (t *ActivityTimer) check() error {
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select {
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case <-t.updated:
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default:
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t.finish()
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}
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return nil
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}
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func (t *ActivityTimer) finish() {
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t.Lock()
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defer t.Unlock()
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if t.onTimeout != nil {
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t.onTimeout()
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t.onTimeout = nil
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}
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if t.checkTask != nil {
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t.checkTask.Close() // nolint: errcheck
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t.checkTask = nil
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}
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}
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func (t *ActivityTimer) SetTimeout(timeout time.Duration) {
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if timeout == 0 {
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t.finish()
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return
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}
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checkTask := &task.Periodic{
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Interval: timeout,
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Execute: t.check,
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}
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t.Lock()
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if t.checkTask != nil {
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t.checkTask.Close() // nolint: errcheck
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}
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t.checkTask = checkTask
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t.Unlock()
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t.Update()
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common.Must(checkTask.Start())
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}
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func CancelAfterInactivity(ctx context.Context, cancel context.CancelFunc, timeout time.Duration) *ActivityTimer {
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timer := &ActivityTimer{
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updated: make(chan struct{}, 1),
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onTimeout: cancel,
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}
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timer.SetTimeout(timeout)
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return timer
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}
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