private async Task <Responses.IVPNResponse> SendRecvAsync(Requests.Request request, TimeSpan timeout)
{
// initialize waiter
Responses.IVPNResponse response = null;
var evt = new ManualResetEvent(false);
Action <Responses.IVPNResponse> waiter = new Action <Responses.IVPNResponse>((resp) =>
{
if (resp.Idx == request.Idx)
{
if (response != null)
{
return;
}
response = resp;
evt.Set();
}
});
try
{
// register waiter
lock (__ResponseWaiters)
{
__RequestCounter += 1;
if (__RequestCounter == 0)
{
__RequestCounter = 1;
}
request.Idx = __RequestCounter;
__ResponseWaiters.Add(waiter);
}
// send request
SendRequest(request);
// wait for response
await Task.Run(() =>
{
if (WaitHandle.WaitTimeout == WaitHandle.WaitAny(new WaitHandle[] { evt, __CancellationToken.Token.WaitHandle }, timeout))
{
throw new TimeoutException("Response timeout");
}
});
}
finally
{
// un-register waiter
lock (__ResponseWaiters)
{
__ResponseWaiters.Remove(waiter);
}
}
return(response);
}
private void responseReceived(Responses.IVPNResponse response)
{
lock (__ResponseWaiters)
{
foreach (var waiter in __ResponseWaiters)
{
waiter(response);
}
}
}