protected virtual NodeStep EvaluateNode(Node node)
{
NodeStep step;
Log.Trace("Entering node {0}", node.GetType().Name);
try
{
step = node.Evaluate();
}
catch
{
step = new NodeStep(NodeResult.Fail, null);
}
if (evaluating)
{
Log.Trace("Exiting node {0} with result {1}{2}", node.GetType().Name, step.Result, step.Slot == null ? "" : (" by slot " + step.Slot.Name));
}
return(step);
}
protected virtual void EvaluateNodes()
{
Node[] stepNodes;
lock (Nodes)
{
if (Nodes.Count == 0)
{
return;
}
stepNodes = Nodes.ToArray();
Nodes.Clear();
}
Thread[] threads = new Thread[stepNodes.Length];
for (int i = 0; i < stepNodes.Length; i++)
{
Node node = stepNodes[i];
// Create the thread
threads[i] = new Thread(() =>
{
NodeStep step = EvaluateNode(node);
if (!evaluating)
{
Return(NodeResult.Stop);
return;
}
switch (step.Result)
{
case NodeResult.Fail: Return(NodeResult.Fail); return;
case NodeResult.Stop: Return(NodeResult.Stop); return;
}
if (step.Result == NodeResult.Success)
{
lock (Nodes)
foreach (Node slotNode in step.Slot.Nodes)
{
Nodes.Add(slotNode);
}
}
lock (this.threads)
{
this.threads.Remove(Thread.CurrentThread);
if (this.threads.Count == 0 && Nodes.Count == 0)
{
Return();
return;
}
}
if (evaluating && !evaluated)
{
EvaluateNodes();
}
});
}
if (!evaluating)
{
Return(NodeResult.Stop);
return;
}
// Register threads
lock (this.threads)
this.threads.AddRange(threads);
// Start threads
foreach (Thread thread in threads)
{
thread.Start();
}
}