mirror of https://github.com/v2ray/v2ray-core
63 lines
981 B
Go
63 lines
981 B
Go
package signal
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import (
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"context"
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"time"
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)
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type ActivityTimer interface {
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Update()
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}
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type realActivityTimer struct {
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updated chan bool
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timeout time.Duration
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ctx context.Context
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cancel context.CancelFunc
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}
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func (t *realActivityTimer) Update() {
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select {
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case t.updated <- true:
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default:
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}
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}
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func (t *realActivityTimer) run() {
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for {
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select {
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case <-time.After(t.timeout):
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case <-t.ctx.Done():
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return
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}
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select {
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case <-t.updated:
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// Updated keep waiting.
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default:
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t.cancel()
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return
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}
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}
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}
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func CancelAfterInactivity(ctx context.Context, timeout time.Duration) (context.Context, ActivityTimer) {
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ctx, cancel := context.WithCancel(ctx)
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timer := &realActivityTimer{
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ctx: ctx,
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cancel: cancel,
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timeout: timeout,
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updated: make(chan bool, 1),
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}
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go timer.run()
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return ctx, timer
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}
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type noOpActivityTimer struct{}
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func (noOpActivityTimer) Update() {}
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func BackgroundTimer() ActivityTimer {
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return noOpActivityTimer{}
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}
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