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6716337f40
And avoid a redundant one passed as argument in search calls. Also renamed gamePly in ply to better clarify this is used as search ply and is set to zero at the beginning of the search. No functional change. Signed-off-by: Marco Costalba <mcostalba@gmail.com>
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
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Stockfish is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Stockfish is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(THREAD_H_INCLUDED)
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#define THREAD_H_INCLUDED
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////
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//// Includes
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////
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#include <cstring>
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#include "lock.h"
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#include "movepick.h"
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#include "position.h"
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#include "search.h"
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////
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//// Constants and variables
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////
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const int MAX_THREADS = 8;
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const int ACTIVE_SPLIT_POINTS_MAX = 8;
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////
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//// Types
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////
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struct SplitPoint {
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// Const data after splitPoint has been setup
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SplitPoint* parent;
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const Position* pos;
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Depth depth;
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bool pvNode, mateThreat;
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Value beta;
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SearchStack sstack[MAX_THREADS][PLY_MAX_PLUS_2];
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// Const pointers to shared data
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MovePicker* mp;
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SearchStack* parentSstack;
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// Shared data
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Lock lock;
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volatile Value alpha;
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volatile Value bestValue;
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volatile int moveCount;
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volatile bool stopRequest;
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volatile int slaves[MAX_THREADS];
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};
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// ThreadState type is used to represent thread's current state
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enum ThreadState
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{
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THREAD_SEARCHING, // thread is performing work
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THREAD_AVAILABLE, // thread is polling for work
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THREAD_SLEEPING, // we are not thinking, so thread is sleeping
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THREAD_BOOKED, // other thread (master) has booked us as a slave
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THREAD_WORKISWAITING, // master has ordered us to start
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THREAD_TERMINATED // we are quitting and thread is terminated
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};
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struct Thread {
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SplitPoint* volatile splitPoint;
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volatile int activeSplitPoints;
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uint64_t nodes;
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uint64_t betaCutOffs[2];
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volatile ThreadState state;
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unsigned char pad[64]; // set some distance among local data for each thread
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};
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#endif // !defined(THREAD_H_INCLUDED)
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