Use atomics instead of volatile

[stockfish] / src / search.h

diff --git a/src/search.h b/src/search.h
index e233c1c8577059dd4e416a46d829eb4621793592..740063b9a59c5d4ff1c4db19bd18416ac4b32e58 100644 (file)
--- 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>
 
@@ -47,6 +48,7 @@ struct Stack {
   Depth reduction;
   Value staticEval;
   bool skipEarlyPruning;
+  int moveCount;
 };
 
 /// RootMove struct is used for moves at the root of the tree. For each root move
@@ -76,7 +78,7 @@ typedef std::vector<RootMove> RootMoveVector;
 struct LimitsType {
 
   LimitsType() { // Init explicitly due to broken value-initialization of non POD in MSVC
-    nodes = time[WHITE] = time[BLACK] = inc[WHITE] = inc[BLACK] = movestogo =
+    nodes = time[WHITE] = time[BLACK] = inc[WHITE] = inc[BLACK] = npmsec = movestogo =
     depth = movetime = mate = infinite = ponder = 0;
   }
 
@@ -85,28 +87,26 @@ struct LimitsType {
   }
 
   std::vector<Move> searchmoves;
-  int time[COLOR_NB], inc[COLOR_NB], movestogo, depth, movetime, mate, infinite, ponder;
+  int time[COLOR_NB], inc[COLOR_NB], npmsec, movestogo, depth, movetime, mate, infinite, ponder;
   int64_t nodes;
+  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 RootMoveVector RootMoves;
-extern Position RootPos;
-extern TimePoint SearchTime;
 extern StateStackPtr SetupStates;
 
 void init();
-void think();
+void reset();
 template<bool Root> uint64_t perft(Position& pos, Depth depth);
 
 } // namespace Search