-/// The SignalsType struct stores atomic flags updated during the search
-/// typically in an async fashion e.g. to stop the search by the GUI.
-
-struct SignalsType {
- std::atomic_bool stop, stopOnPonderhit, firstRootMove, failedLowAtRoot;
-};
-
-typedef std::unique_ptr<std::stack<StateInfo>> StateStackPtr;
-
-extern SignalsType Signals;