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82 lines
1.3 KiB
82 lines
1.3 KiB
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 ActivityUpdater interface {
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Update()
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}
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type ActivityTimer struct {
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updated chan struct{}
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timeout chan time.Duration
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closing chan struct{}
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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) SetTimeout(timeout time.Duration) {
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select {
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case <-t.closing:
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case t.timeout <- timeout:
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}
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}
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func (t *ActivityTimer) run(ctx context.Context, cancel context.CancelFunc) {
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defer func() {
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cancel()
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close(t.closing)
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}()
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timeout := <-t.timeout
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if timeout == 0 {
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return
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}
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ticker := time.NewTicker(timeout)
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defer func() {
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ticker.Stop()
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}()
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for {
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select {
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case <-ticker.C:
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case <-ctx.Done():
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return
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case timeout := <-t.timeout:
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if timeout == 0 {
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return
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}
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ticker.Stop()
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ticker = time.NewTicker(timeout)
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continue
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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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return
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}
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}
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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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timeout: make(chan time.Duration, 1),
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updated: make(chan struct{}, 1),
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closing: make(chan struct{}),
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}
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timer.timeout <- timeout
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go timer.run(ctx, cancel)
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return timer
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}
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