X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.h;h=740063b9a59c5d4ff1c4db19bd18416ac4b32e58;hp=c7abb9dcfd97a2b5b47b87f798fc4e5718cd2bb7;hb=00d9e9fd283b31e63389af091b158dbc3fedfc0e;hpb=3428a2875197c805c25fdd954ba3a24d00845a2a

diff --git a/src/search.h b/src/search.h
index c7abb9dc..740063b9 100644
--- a/src/search.h
+++ b/src/search.h
@@ -20,7 +20,8 @@
 #ifndef SEARCH_H_INCLUDED
 #define SEARCH_H_INCLUDED
 
-#include <memory>  // For std::auto_ptr
+#include <atomic>
+#include <memory>  // For std::unique_ptr
 #include <stack>
 #include <vector>
 
@@ -91,16 +92,16 @@ struct LimitsType {
   TimePoint startTime;
 };
 
-/// The SignalsType struct stores volatile flags updated during the search
+/// 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 {
-  bool stop, stopOnPonderhit, firstRootMove, failedLowAtRoot;
+  std::atomic<bool> stop, stopOnPonderhit, firstRootMove, failedLowAtRoot;
 };
 
 typedef std::unique_ptr<std::stack<StateInfo>> StateStackPtr;
 
-extern volatile SignalsType Signals;
+extern SignalsType Signals;
 extern LimitsType Limits;
 extern StateStackPtr SetupStates;