2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
5 Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
7 Stockfish is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 Stockfish is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #ifndef THREAD_H_INCLUDED
22 #define THREAD_H_INCLUDED
26 #include <condition_variable>
36 #include "thread_win32.h"
39 /// Thread struct keeps together all the thread-related stuff. We also use
40 /// per-thread pawn and material hash tables so that once we get a pointer to an
41 /// entry its life time is unlimited and we don't have to care about someone
42 /// changing the entry under our feet.
46 std::thread nativeThread;
48 ConditionVariable sleepCondition;
54 virtual void search();
56 void start_searching(bool resume = false);
57 void wait_for_search_finished();
58 void wait(std::atomic_bool& b);
60 Pawns::Table pawnsTable;
61 Material::Table materialTable;
67 Search::RootMoveVector rootMoves;
70 MoveStats counterMoves;
72 std::atomic_bool resetCalls;
76 /// MainThread is a derived class with a specific overload for the main thread
78 struct MainThread : public Thread {
79 virtual void search();
81 bool easyMovePlayed, failedLow;
82 double bestMoveChanges;
87 /// ThreadPool struct handles all the threads-related stuff like init, starting,
88 /// parking and, most importantly, launching a thread. All the access to threads
89 /// data is done through this class.
91 struct ThreadPool : public std::vector<Thread*> {
93 void init(); // No constructor and destructor, threads rely on globals that should
94 void exit(); // be initialized and valid during the whole thread lifetime.
96 MainThread* main() { return static_cast<MainThread*>(at(0)); }
97 void start_thinking(const Position&, const Search::LimitsType&, Search::StateStackPtr&);
98 void read_uci_options();
99 int64_t nodes_searched();
102 extern ThreadPool Threads;
104 #endif // #ifndef THREAD_H_INCLUDED