// first is true if this is the first time the send is acked. latency is
// calculated for the first ack.
func (s *send) Ack() (latency time.Duration, first bool) {
first = !s.acked
if first {
latency = missinggo.MonotonicSince(s.started)
}
s.acked = true
cond.Broadcast()
if s.resendTimer != nil {
s.resendTimer.Stop()
s.resendTimer = nil
}
return
}
func (s *send) timeoutResend() {
mu.Lock()
defer mu.Unlock()
if missinggo.MonotonicSince(s.started) >= writeTimeout {
s.timedOut()
return
}
if s.acked || s.conn.destroyed.Get() {
return
}
rt := s.conn.resendTimeout()
go s.resend()
s.numResends++
s.resendTimer.Reset(rt * time.Duration(s.numResends))
}