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| Rev | Author | Line No. | Line |
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| 96 | pmbaty | 1 | /* |
| 2 | Stockfish, a UCI chess playing engine derived from Glaurung 2.1 |
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| 3 | Copyright (C) 2004-2008 Tord Romstad (Glaurung author) |
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| 4 | Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad |
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| 5 | Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad |
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| 6 | |||
| 7 | Stockfish is free software: you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation, either version 3 of the License, or |
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| 10 | (at your option) any later version. |
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| 11 | |||
| 12 | Stockfish is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |||
| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 19 | */ |
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| 20 | |||
| 21 | #ifndef THREAD_H_INCLUDED |
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| 22 | #define THREAD_H_INCLUDED |
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| 23 | |||
| 24 | #include <atomic> |
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| 25 | #include <bitset> |
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| 26 | #include <condition_variable> |
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| 27 | #include <mutex> |
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| 28 | #include <thread> |
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| 29 | #include <vector> |
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| 30 | |||
| 31 | #include "material.h" |
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| 32 | #include "movepick.h" |
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| 33 | #include "pawns.h" |
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| 34 | #include "position.h" |
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| 35 | #include "search.h" |
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| 36 | #include "thread_win32.h" |
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| 37 | |||
| 38 | |||
| 39 | /// Thread struct keeps together all the thread-related stuff. We also use |
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| 40 | /// per-thread pawn and material hash tables so that once we get a pointer to an |
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| 41 | /// entry its life time is unlimited and we don't have to care about someone |
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| 42 | /// changing the entry under our feet. |
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| 43 | |||
| 44 | class Thread { |
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| 45 | |||
| 46 | std::thread nativeThread; |
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| 47 | Mutex mutex; |
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| 48 | ConditionVariable sleepCondition; |
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| 49 | bool exit, searching; |
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| 50 | |||
| 51 | public: |
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| 52 | Thread(); |
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| 53 | virtual ~Thread(); |
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| 54 | virtual void search(); |
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| 55 | void idle_loop(); |
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| 56 | void start_searching(bool resume = false); |
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| 57 | void wait_for_search_finished(); |
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| 58 | void wait(std::atomic_bool& b); |
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| 59 | |||
| 60 | Pawns::Table pawnsTable; |
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| 61 | Material::Table materialTable; |
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| 62 | Endgames endgames; |
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| 63 | size_t idx, PVIdx; |
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| 64 | int maxPly, callsCnt; |
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| 65 | |||
| 66 | Position rootPos; |
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| 67 | Search::RootMoveVector rootMoves; |
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| 68 | Depth rootDepth; |
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| 69 | HistoryStats history; |
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| 70 | MoveStats counterMoves; |
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| 71 | Depth completedDepth; |
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| 72 | std::atomic_bool resetCalls; |
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| 73 | }; |
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| 74 | |||
| 75 | |||
| 76 | /// MainThread is a derived class with a specific overload for the main thread |
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| 77 | |||
| 78 | struct MainThread : public Thread { |
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| 79 | virtual void search(); |
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| 80 | |||
| 81 | bool easyMovePlayed, failedLow; |
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| 82 | double bestMoveChanges; |
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| 83 | Value previousScore; |
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| 84 | }; |
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| 85 | |||
| 86 | |||
| 87 | /// ThreadPool struct handles all the threads-related stuff like init, starting, |
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| 88 | /// parking and, most importantly, launching a thread. All the access to threads |
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| 89 | /// data is done through this class. |
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| 90 | |||
| 91 | struct ThreadPool : public std::vector<Thread*> { |
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| 92 | |||
| 93 | void init(); // No constructor and destructor, threads rely on globals that should |
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| 94 | void exit(); // be initialized and valid during the whole thread lifetime. |
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| 95 | |||
| 96 | MainThread* main() { return static_cast<MainThread*>(at(0)); } |
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| 97 | void start_thinking(const Position&, const Search::LimitsType&, Search::StateStackPtr&); |
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| 98 | void read_uci_options(); |
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| 99 | int64_t nodes_searched(); |
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| 100 | }; |
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| 101 | |||
| 102 | extern ThreadPool Threads; |
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| 103 | |||
| 104 | #endif // #ifndef THREAD_H_INCLUDED |