Avoid using EmptySearchStack global

[stockfish] / src / search.h

diff --git a/src/search.h b/src/search.h
index c8d841a12f5778bd56f84fb22eab04b86b76dabb..62d3fe9ed9f4055eadd1800679bee69f9f25b274 100644 (file)
--- a/src/search.h
+++ b/src/search.h
@@ -1,18 +1,18 @@
 /*
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
-  Copyright (C) 2008 Marco Costalba
+  Copyright (C) 2008-2009 Marco Costalba
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
-  
+
   Stockfish is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
-  
+
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
@@ -55,11 +55,13 @@ const int KILLER_MAX = 2;
 struct SearchStack {
   Move pv[PLY_MAX];
   Move currentMove;
-  Value currentMoveCaptureValue;
   Move mateKiller;
   Move threatMove;
   Move killers[KILLER_MAX];
   Depth reduction;
+
+  void init(int ply);
+  void initKillers();
 };
 
 
@@ -67,13 +69,12 @@ struct SearchStack {
 //// Global variables
 ////
 
-extern SearchStack EmptySearchStack;
 extern TranspositionTable TT;
 extern int ActiveThreads;
 extern Lock SMPLock;
 
 // Perhaps better to make H local, and pass as parameter to MovePicker?
-extern History H;  
+extern History H;
 
 
 ////
@@ -82,8 +83,8 @@ extern History H;
 
 extern void init_threads();
 extern void stop_threads();
-extern void think(const Position &pos, bool infinite, bool ponder, int side_to_move,
-                  int time[], int increment[], int movesToGo, int maxDepth, 
+extern bool think(const Position &pos, bool infinite, bool ponder, int side_to_move,
+                  int time[], int increment[], int movesToGo, int maxDepth,
                   int maxNodes, int maxTime, Move searchMoves[]);
 extern int64_t nodes_searched();