/// <summary>
/// AfterFunc waits for the duration to elapse and then calls f in its own goroutine.
/// It returns a <see cref="Timer"/> that can be used to cancel the call using its Stop method.
/// </summary>
public static Timer AfterFunc(TimeSpan duration, Action f)
{
if (duration < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException("duration", duration, "duration must be >= 0");
}
if (f == null)
{
throw new ArgumentNullException("f");
}
var timer = new Timer(duration);
GoFunc.Run(() =>
{
bool ok;
timer.C.ReceiveOk(out ok);
if (ok)
{
f();
}
}, string.Format("Time.AfterFunc started:{0} duration:{1}", DateTime.Now, duration));
return(timer);
}
/// <summary>
/// Creates a new <see cref="Timer"/> that will send the current time on its channel <see cref="C"/> after at least
/// <paramref name="duration" />.
/// </summary>
public Timer(TimeSpan duration)
{
_isTimerActive = 1;
GoFunc.Run(() =>
{
bool ok;
Time.After(duration).ReceiveOk(out ok);
if (ok)
{
if (Interlocked.CompareExchange(ref _isTimerActive, 0, 1) == 1)
{
_timerChan.Send(DateTime.Now);
_timerChan.Close();
}
}
}, string.Format("timer started:{0} duration:{1}", DateTime.Now, duration));
}
/// <summary>
/// DialTimeout acts like Dial but takes a timeout. The timeout includes name resolution, if required.
/// </summary>
public static IConn DialTimeout(string network, string address, TimeSpan timeout)
{
if (network != "tcp")
{
throw new ArgumentException("only 'tcp' network is supported", "network");
}
var dialChan = new Chan <IConn>();
var timeoutChan = Time.After(timeout);
GoFunc.Run(() =>
{
try
{
var tmpConn = Dial(network, address);
dialChan.Send(tmpConn);
}
catch
{
// handling timeout below, don't bring down the whole app with an unhandled thread exception
}
}, "Net:DialTimeout");
IConn conn = null;
Select
.CaseReceive(dialChan, c => conn = c)
.CaseReceive(timeoutChan, o =>
{
throw new TimeoutException(string.Format("timeout {0} exceed when dialing {1}", timeout, address));
})
.NoDefault();
timeoutChan.Close();
return(conn);
}
