Use a timer to avoid polling

[stockfish] / src / search.h

diff --git a/src/search.h b/src/search.h
index 1dc4e1fa572565ca04e9c36f4201baf1be4d624f..757aeb002ae110896c7f89d0b0afb019da1e523e 100644 (file)
--- 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) 2008-2009 Marco Costalba
+  Copyright (C) 2008-2010 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
@@ -17,64 +17,57 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-
 #if !defined(SEARCH_H_INCLUDED)
 #define SEARCH_H_INCLUDED
 
-////
-//// Includes
-////
+#include <cstring>
 
-#include "depth.h"
 #include "move.h"
-#include "value.h"
-
-
-////
-//// Constants
-////
-
-const int PLY_MAX = 100;
-const int PLY_MAX_PLUS_2 = 102;
-const int KILLER_MAX = 2;
+#include "types.h"
 
-
-////
-//// Types
-////
+class Position;
+struct SplitPoint;
 
 /// The SearchStack 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 SearchStack objects, indexed by the
 /// current ply.
-struct EvalInfo;
 
 struct SearchStack {
-  Move pv[PLY_MAX_PLUS_2];
+  SplitPoint* sp;
+  int ply;
   Move currentMove;
-  Move mateKiller;
-  Move threatMove;
-  Move killers[KILLER_MAX];
+  Move excludedMove;
+  Move bestMove;
+  Move killers[2];
   Depth reduction;
   Value eval;
-
-  void init(int ply);
-  void initKillers();
+  Value evalMargin;
+  int skipNullMove;
 };
 
 
-////
-//// Prototypes
-////
+/// The SearchLimits 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.
 
-extern void init_search();
-extern void init_threads();
-extern void stop_threads();
-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 int perft(Position &pos, Depth depth);
-extern int64_t nodes_searched();
+struct SearchLimits {
 
+  SearchLimits() { memset(this, 0, sizeof(SearchLimits)); }
+
+  SearchLimits(int t, int i, int mtg, int mt, int md, int mn, bool inf, bool pon)
+              : time(t), increment(i), movesToGo(mtg), maxTime(mt), maxDepth(md),
+                maxNodes(mn), infinite(inf), ponder(pon) {}
+
+  bool useTimeManagement() const { return !(maxTime | maxDepth | maxNodes | infinite); }
+
+  int time, increment, movesToGo, maxTime, maxDepth, maxNodes, infinite, ponder;
+};
+
+extern void init_search();
+extern int64_t perft(Position& pos, Depth depth);
+extern bool think(Position& pos, const SearchLimits& limits, Move searchMoves[]);
+extern void do_uci_async_cmd(const std::string& cmd);
+extern void do_timer_event();
 
 #endif // !defined(SEARCH_H_INCLUDED)