private void InvokeCallbacks()
{
var value = Interlocked.Exchange(ref _callback, _callbackCompletionSentinel);
if (value != null)
{
var invokeAsync = (_flags & _flagRunContinuationsAsynchronously) != 0;
if (value is CallbackCollection callbackList)
{
lock (callbackList)
{
callbackList.Invoke(invokeAsync);
}
}
else if (invokeAsync)
{
CallbackUtility.InvokeCompletionCallbackAsync(this, value, SynchronizationContext.Current);
}
else
{
CallbackUtility.InvokeCompletionCallback(this, value);
}
}
}
private void InvokeCompletionCallback(object continuation, SynchronizationContext syncContext)
{
if ((_flags & _flagRunContinuationsAsynchronously) != 0)
{
CallbackUtility.InvokeCompletionCallbackAsync(this, continuation, syncContext);
}
else if (syncContext == null || syncContext == SynchronizationContext.Current)
{
CallbackUtility.InvokeCompletionCallback(this, continuation);
}
else
{
syncContext.Post(args => CallbackUtility.InvokeCompletionCallback(this, args), continuation);
}
}