X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fevaluate.h;h=0004dd6319defab08530ed1aa10646e3bb9ff060;hp=d9e032556bb8ad840f78624cfd7c9b84b79122ba;hb=ad5d86c7714ae3eaad71e8b3630d38c29dd2c3fe;hpb=be382bb0cf5927dc10ff9be882f6980a78d1484a

diff --git a/src/evaluate.h b/src/evaluate.h
index d9e03255..0004dd63 100644
--- a/src/evaluate.h
+++ b/src/evaluate.h
@@ -2,7 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
-  Copyright (C) 2015-2017 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
+  Copyright (C) 2015-2018 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@
 #ifndef EVALUATE_H_INCLUDED
 #define EVALUATE_H_INCLUDED
 
+#include <atomic>
 #include <string>
 
 #include "types.h"
@@ -31,7 +32,7 @@ namespace Eval {
 
 const Value Tempo = Value(20); // Must be visible to search
 
-extern Score Contempt;
+extern std::atomic<Score> Contempt;
 
 std::string trace(const Position& pos);