internal void RemoveNode(LibraryNode node)
{
lock (this) {
_root = _root.Clone();
_root.RemoveNode(node);
_updateCount++;
}
}
private void ApplyUpdates(bool assumeLockHeld)
{
if (!assumeLockHeld)
{
if (!_searching.Wait(0))
{
// Didn't get the lock immediately, which means we are
// currently searching. Once the search is done, updates
// will be applied.
return;
}
}
try
{
lock (_updates)
{
if (_updates.Count == 0)
{
return;
}
// re-create root node here because we may have handed out
// the node before and don't want to mutate it's list.
_root = _root.Clone();
_updateCount += 1;
foreach (var kv in _updates)
{
switch (kv.Key)
{
case UpdateType.Add:
_root.AddNode(kv.Value);
break;
case UpdateType.Remove:
_root.RemoveNode(kv.Value);
break;
default:
Debug.Fail("Unsupported update type " + kv.Key.ToString());
break;
}
}
_updates.Clear();
}
}
finally
{
if (!assumeLockHeld)
{
_searching.Release();
}
}
}
