Move stop signal to Threads

[stockfish] / src / search.h

diff --git a/src/search.h b/src/search.h
index 6248cd0193310bf4c577f1bfd9d248230c4c326d..7c46980b2d36f07808e1f7acd8b02fbdb46062ac 100644 (file)
--- a/src/search.h
+++ b/src/search.h
@@ -2,6 +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
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -20,15 +21,14 @@
 #ifndef SEARCH_H_INCLUDED
 #define SEARCH_H_INCLUDED
 
-#include <atomic>
-#include <memory>  // For std::unique_ptr
-#include <stack>
 #include <vector>
 
 #include "misc.h"
-#include "position.h"
+#include "movepick.h"
 #include "types.h"
 
+class Position;
+
 namespace Search {
 
 /// Stack struct keeps track of the information we need to remember from nodes
@@ -37,17 +37,17 @@ namespace Search {
 
 struct Stack {
   Move* pv;
+  PieceToHistory* history;
   int ply;
   Move currentMove;
-  Move ttMove;
   Move excludedMove;
   Move killers[2];
-  Depth reduction;
   Value staticEval;
-  bool skipEarlyPruning;
+  int statScore;
   int moveCount;
 };
 
+
 /// RootMove struct is used for moves at the root of the tree. For each root move
 /// we store a score and a PV (really a refutation in the case of moves which
 /// fail low). Score is normally set at -VALUE_INFINITE for all non-pv moves.
@@ -55,18 +55,20 @@ struct Stack {
 struct RootMove {
 
   explicit RootMove(Move m) : pv(1, m) {}
-
-  bool operator<(const RootMove& m) const { return score > m.score; } // Ascending sort
-  bool operator==(const Move& m) const { return pv[0] == m; }
-  void insert_pv_in_tt(Position& pos);
   bool extract_ponder_from_tt(Position& pos);
+  bool operator==(const Move& m) const { return pv[0] == m; }
+  bool operator<(const RootMove& m) const { // Sort in descending order
+    return m.score != score ? m.score < score
+                            : m.previousScore < previousScore;
+  }
 
   Value score = -VALUE_INFINITE;
   Value previousScore = -VALUE_INFINITE;
   std::vector<Move> pv;
 };
 
-typedef std::vector<RootMove> RootMoveVector;
+typedef std::vector<RootMove> RootMoves;
+
 
 /// LimitsType struct stores information sent by GUI about available time to
 /// search the current move, maximum depth/time, if we are in analysis mode or
@@ -75,8 +77,8 @@ 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] = npmsec = movestogo =
-    depth = movetime = mate = infinite = ponder = 0;
+    nodes = time[WHITE] = time[BLACK] = inc[WHITE] = inc[BLACK] =
+    npmsec = movestogo = depth = movetime = mate = infinite = ponder = 0;
   }
 
   bool use_time_management() const {
@@ -89,22 +91,11 @@ struct LimitsType {
   TimePoint startTime;
 };
 
-/// 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;
 extern LimitsType Limits;
-extern StateStackPtr SetupStates;
 
 void init();
-void reset();
-template<bool Root> uint64_t perft(Position& pos, Depth depth);
+void clear();
+template<bool Root = true> uint64_t perft(Position& pos, Depth depth);
 
 } // namespace Search