public Buffer SetState(QpcTimeStamp qpcTimeStamp, BufferState state, string reason)
{
BufferState entryState = State;
State = state;
TimeStamp = qpcTimeStamp;
switch (state)
{
case BufferState.SendPosted: CopyHeaderToByteArray(); SendPostedTimeStamp = qpcTimeStamp; break;
case BufferState.Received: UpdateHeaderFromByteArray(); break;
default: break;
}
if (StateEmitter.IsEnabled)
{
StateEmitter.Emit("{0} State changed to {1} [from: {2}, reason: {3}]", BufferName, state, entryState, reason ?? "NoReasonGiven");
}
INotifyable notifyOnStateChange = NotifyOnSetState;
if (notifyOnStateChange != null)
{
notifyOnStateChange.Notify();
}
return(this);
}
private void InternalNotify(string token, object sender,
NotificationEventArgs e, bool post)
{
// Get weak subscribers
List <WeakReference> weakSubscribers;
lock (_sharedLock)
{
if (!_subscriptions.TryGetValue(token, out weakSubscribers))
{
return;
}
// Make a copy while locked
weakSubscribers = weakSubscribers.ToList();
}
// Get compatible living subscribers
var subscribers = from w in weakSubscribers
let s = w.Target as INotifyable
where w != null && w.IsAlive && s != null
select s;
// Invoke each callback associated with token
foreach (var subscriber in subscribers)
{
INotifyable subscriber1 = subscriber;
SafeNotify(() => subscriber1.Notify(token, sender, e));
}
lock (_sharedLock)
{
if (_subscriptions.ContainsKey(token))
{
// Remove subscribers who are no longer alive
var deadSubscribers = weakSubscribers
.Where(w => w == null || !w.IsAlive);
foreach (var s in deadSubscribers)
{
_subscriptions[token].Remove(s);
}
// Remove dictionary entry if no subscibers left
if (_subscriptions[token].Count == 0)
{
_subscriptions.Remove(token);
}
}
}
}