public static IDisposable Push(string operation)
{
OperationStackItem parent = CallContext.LogicalGetData(OperationStackSlot) as OperationStackItem;
OperationStackItem op = new OperationStackItem(parent, operation);
CallContext.LogicalSetData(OperationStackSlot, op);
return(op);
}
public static IEnumerable <object> Operations()
{
OperationStackItem current = Top();
while (current != null)
{
yield return(current.Operation);
current = current.Parent;
}
}
public static object Pop()
{
OperationStackItem current = CallContext.LogicalGetData(OperationStackSlot) as OperationStackItem;
if (current != null)
{
CallContext.LogicalSetData(OperationStackSlot, current.Parent);
return(current.Operation);
}
else
{
CallContext.FreeNamedDataSlot(OperationStackSlot);
}
return(null);
}
internal OperationStackItem(OperationStackItem parentOperation, object operation)
{
parent = parentOperation;
this.operation = operation;
depth = parent == null ? 1 : parent.Depth + 1;
}
internal static OperationStackItem Top()
{
OperationStackItem top = CallContext.LogicalGetData(OperationStackSlot) as OperationStackItem;
return(top);
}
public static object Peek()
{
OperationStackItem top = Top();
return(top != null ? top.Operation : null);
}
