X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.h;h=740063b9a59c5d4ff1c4db19bd18416ac4b32e58;hp=b4fb26ae72b9bee3b1bd80f1bfd225e12e654518;hb=00d9e9fd283b31e63389af091b158dbc3fedfc0e;hpb=06b9140e5ccd9e3579315ea2abb2ba93126c48fa

diff --git a/src/search.h b/src/search.h
index b4fb26ae..740063b9 100644
--- a/src/search.h
+++ b/src/search.h
@@ -1,7 +1,7 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, 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
@@ -17,11 +17,11 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#if !defined(SEARCH_H_INCLUDED)
+#ifndef SEARCH_H_INCLUDED
 #define SEARCH_H_INCLUDED
 
-#include <cstring>
-#include <memory>
+#include <atomic>
+#include <memory>  // For std::unique_ptr
 #include <stack>
 #include <vector>
 
@@ -33,80 +33,82 @@ struct SplitPoint;
 
 namespace Search {
 
-/// The Stack struct keeps track of the information we need to remember from
-/// nodes shallower and deeper in the tree during the search. Each search thread
-/// has its own array of Stack objects, indexed by the current ply.
+/// Stack struct keeps track of the information we need to remember from nodes
+/// shallower and deeper in the tree during the search. Each search thread has
+/// its own array of Stack objects, indexed by the current ply.
 
 struct Stack {
   SplitPoint* splitPoint;
+  Move* pv;
   int ply;
   Move currentMove;
+  Move ttMove;
   Move excludedMove;
   Move killers[2];
   Depth reduction;
   Value staticEval;
-  Value evalMargin;
-  int skipNullMove;
-  int futilityMoveCount;
+  bool skipEarlyPruning;
+  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.
 
-/// RootMove struct is used for moves at the root of the tree. For each root
-/// move we store a score, a node count, 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.
 struct RootMove {
 
-  RootMove(Move m) : score(-VALUE_INFINITE), prevScore(-VALUE_INFINITE) {
-    pv.push_back(m); pv.push_back(MOVE_NONE);
-  }
+  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 extract_pv_from_tt(Position& pos);
   void insert_pv_in_tt(Position& pos);
+  bool extract_ponder_from_tt(Position& pos);
 
-  Value score;
-  Value prevScore;
+  Value score = -VALUE_INFINITE;
+  Value previousScore = -VALUE_INFINITE;
   std::vector<Move> pv;
 };
 
+typedef std::vector<RootMove> RootMoveVector;
 
-/// The 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 if we have to ponder while is our opponent's side to move.
+/// 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
+/// if we have to ponder while it's our opponent's turn to move.
 
 struct LimitsType {
 
-  LimitsType() { memset(this, 0, sizeof(LimitsType)); }
-  bool use_time_management() const { return !(mate | movetime | depth | nodes | infinite); }
+  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;
+  }
+
+  bool use_time_management() const {
+    return !(mate | movetime | depth | nodes | infinite);
+  }
 
-  int time[COLOR_NB], inc[COLOR_NB], movestogo, depth, nodes, movetime, mate, infinite, ponder;
+  std::vector<Move> searchmoves;
+  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
-/// typically in an async fashion, for instance to stop the search by the GUI.
+/// 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 stopOnPonderhit, firstRootMove, stop, failedLowAtRoot;
+  std::atomic<bool> stop, stopOnPonderhit, firstRootMove, failedLowAtRoot;
 };
 
-typedef std::auto_ptr<std::stack<StateInfo> > StateStackPtr;
+typedef std::unique_ptr<std::stack<StateInfo>> StateStackPtr;
 
-extern volatile SignalsType Signals;
+extern SignalsType Signals;
 extern LimitsType Limits;
-extern std::vector<RootMove> RootMoves;
-extern Position RootPos;
-extern Color RootColor;
-extern Time::point SearchTime;
 extern StateStackPtr SetupStates;
 
-extern void init();
-extern size_t perft(Position& pos, Depth depth);
-extern void think();
+void init();
+void reset();
+template<bool Root> uint64_t perft(Position& pos, Depth depth);
 
 } // namespace Search
 
-#endif // !defined(SEARCH_H_INCLUDED)
+#endif // #ifndef SEARCH_H_INCLUDED