X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fsearch.h;h=afa12b3a4ee6b56104918178aeee4bdd50e6845a;hb=99f2c1a2a64cac94ee56324fa25f8fba04cd1347;hp=65b3b4a7107d03668032db961be252dbb59a6981;hpb=076b62310ee874adb38d2c9610aad163db65e2e8;p=stockfish
diff --git a/src/search.h b/src/search.h
index 65b3b4a7..afa12b3a 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) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2014 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
@@ -17,40 +17,111 @@
along with this program. If not, see .
*/
-#if !defined(SEARCH_H_INCLUDED)
+#ifndef SEARCH_H_INCLUDED
#define SEARCH_H_INCLUDED
-#include "move.h"
-#include "types.h"
+#include
+#include
+#include
+#include "misc.h"
+#include "position.h"
+#include "types.h"
-/// 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 SplitPoint;
-struct SearchStack {
+namespace Search {
+
+struct PVEntry {
+ Move pv[MAX_PLY+1];
+
+ void update(Move move, PVEntry* child) {
+ pv[0] = move;
+
+ int i = 1;
+ for (; child && i < MAX_PLY && child->pv[i - 1] != MOVE_NONE; ++i)
+ pv[i] = child->pv[i - 1];
+ pv[i] = MOVE_NONE;
+ }
+};
+
+/// 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.
+
+struct Stack {
+ SplitPoint* splitPoint;
+ PVEntry* pv;
int ply;
Move currentMove;
- Move mateKiller;
+ Move ttMove;
Move excludedMove;
- Move bestMove;
Move killers[2];
Depth reduction;
- Value eval;
- Value evalMargin;
+ Value staticEval;
bool skipNullMove;
- SplitPoint* sp;
};
-class Position;
-extern void init_threads();
-extern void exit_threads();
-extern int64_t perft(Position& pos, Depth depth);
-extern bool think(Position& pos, bool infinite, bool ponder, int time[], int increment[],
- int movesToGo, int maxDepth, int maxNodes, int maxTime, Move searchMoves[]);
+/// 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);
+ }
+
+ 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);
+
+ Value score;
+ Value prevScore;
+ std::vector pv;
+};
+
+
+/// 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 it's our opponent's turn to move.
+
+struct LimitsType {
+
+ LimitsType() { // Using memset on a std::vector is undefined behavior
+ nodes = time[WHITE] = time[BLACK] = inc[WHITE] = inc[BLACK] = movestogo =
+ depth = movetime = mate = infinite = ponder = 0;
+ }
+ bool use_time_management() const { return !(mate | movetime | depth | nodes | infinite); }
+
+ std::vector searchmoves;
+ int time[COLOR_NB], inc[COLOR_NB], movestogo, depth, movetime, mate, infinite, ponder;
+ int64_t nodes;
+};
+
+
+/// The SignalsType struct stores volatile flags updated during the search
+/// typically in an async fashion e.g. to stop the search by the GUI.
+
+struct SignalsType {
+ bool stop, stopOnPonderhit, firstRootMove, failedLowAtRoot;
+};
+
+typedef std::auto_ptr > StateStackPtr;
+
+extern volatile SignalsType Signals;
+extern LimitsType Limits;
+extern std::vector RootMoves;
+extern Position RootPos;
+extern Time::point SearchTime;
+extern StateStackPtr SetupStates;
+
+void init();
+void think();
+template uint64_t perft(Position& pos, Depth depth);
+
+} // namespace Search
-#endif // !defined(SEARCH_H_INCLUDED)
+#endif // #ifndef SEARCH_H_INCLUDED