init - add project files

vendor/github.com/jonboulle/clockwork/timer.go

@@ -0,0 +1,53 @@
+package clockwork
+
+import "time"
+
+// Timer provides an interface which can be used instead of directly using
+// [time.Timer]. The real-time timer t provides events through t.C which becomes
+// t.Chan() to make this channel requirement definable in this interface.
+type Timer interface {
+	Chan() <-chan time.Time
+	Reset(d time.Duration) bool
+	Stop() bool
+}
+
+type realTimer struct{ *time.Timer }
+
+func (r realTimer) Chan() <-chan time.Time {
+	return r.C
+}
+
+type fakeTimer struct {
+	firer
+
+	// reset and stop provide the implmenetation of the respective exported
+	// functions.
+	reset func(d time.Duration) bool
+	stop  func() bool
+
+	// If present when the timer fires, the timer calls afterFunc in its own
+	// goroutine rather than sending the time on Chan().
+	afterFunc func()
+}
+
+func (f *fakeTimer) Reset(d time.Duration) bool {
+	return f.reset(d)
+}
+
+func (f *fakeTimer) Stop() bool {
+	return f.stop()
+}
+
+func (f *fakeTimer) expire(now time.Time) *time.Duration {
+	if f.afterFunc != nil {
+		go f.afterFunc()
+		return nil
+	}
+
+	// Never block on expiration.
+	select {
+	case f.c <- now:
+	default:
+	}
+	return nil
+}