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https://github.com/HChaZZY/Stockfish.git
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c28b9ef182
Let to sleep even split point master, it will be waken up by its slaves when they return from the search. This time let it be enabled by an UCI option, so people is free to test it on their Hyper Thread box. Option is disabled by default. No functional change. Signed-off-by: Marco Costalba <mcostalba@gmail.com>
97 lines
2.3 KiB
C
97 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 MAX_ACTIVE_SPLIT_POINTS = 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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int ply;
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int master;
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Move threatMove;
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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 int64_t nodes;
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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_INITIALIZING, // thread is initializing itself
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THREAD_SEARCHING, // thread is performing work
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THREAD_AVAILABLE, // thread is waiting for work
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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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volatile ThreadState state;
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SplitPoint* volatile splitPoint;
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volatile int activeSplitPoints;
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SplitPoint splitPoints[MAX_ACTIVE_SPLIT_POINTS];
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};
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#endif // !defined(THREAD_H_INCLUDED)
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