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) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, 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
#ifndef SEARCH_H_INCLUDED
#define SEARCH_H_INCLUDED
-#include <atomic>
#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
struct Stack {
Move* pv;
+ PieceToHistory* history;
int ply;
Move currentMove;
Move excludedMove;
Move killers[2];
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.
struct RootMove {
explicit RootMove(Move m) : pv(1, m) {}
-
- bool operator<(const RootMove& m) const { return m.score < score; } // Descending 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;
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
/// if we have to ponder while it's our opponent's turn to move.
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;
-};
-
-extern SignalsType Signals;
extern LimitsType Limits;
void init();