X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fthread.h;h=d6a48eca73d14937f19212d462d9a120398d21d0;hp=46da1e348d128fbf01a8f39c458c8a57b3b94450;hb=HEAD;hpb=4004bcf3a48c47450344e93fcf186e3eb5d32165 diff --git a/src/thread.h b/src/thread.h index 46da1e34..cb2f6db1 100644 --- a/src/thread.h +++ b/src/thread.h @@ -1,6 +1,6 @@ /* Stockfish, a UCI chess playing engine derived from Glaurung 2.1 - Copyright (C) 2004-2020 The Stockfish developers (see AUTHORS file) + Copyright (C) 2004-2023 The Stockfish developers (see AUTHORS file) Stockfish is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -21,110 +21,115 @@ #include #include +#include +#include #include -#include #include -#include "material.h" #include "movepick.h" -#include "pawns.h" #include "position.h" #include "search.h" #include "thread_win32_osx.h" +#include "types.h" +namespace Stockfish { -/// Thread class keeps together all the thread-related stuff. We use -/// per-thread pawn and material hash tables so that once we get a -/// pointer to an entry its life time is unlimited and we don't have -/// to care about someone changing the entry under our feet. - +// Thread class keeps together all the thread-related stuff. class Thread { - std::mutex mutex; - std::condition_variable cv; - size_t idx; - bool exit = false, searching = true; // Set before starting std::thread - NativeThread stdThread; - -public: - explicit Thread(size_t); - virtual ~Thread(); - virtual void search(); - void clear(); - void idle_loop(); - void start_searching(); - void wait_for_search_finished(); - int best_move_count(Move move) const; - - Pawns::Table pawnsTable; - Material::Table materialTable; - size_t pvIdx, pvLast; - uint64_t ttHitAverage; - int selDepth, nmpMinPly; - Color nmpColor; - std::atomic nodes, tbHits, bestMoveChanges; - - Position rootPos; - Search::RootMoves rootMoves; - Depth rootDepth, completedDepth; - CounterMoveHistory counterMoves; - ButterflyHistory mainHistory; - LowPlyHistory lowPlyHistory; - CapturePieceToHistory captureHistory; - ContinuationHistory continuationHistory[2][2]; - Score contempt; + std::mutex mutex; + std::condition_variable cv; + size_t idx; + bool exit = false, searching = true; // Set before starting std::thread + NativeThread stdThread; + + public: + explicit Thread(size_t); + virtual ~Thread(); + virtual void search(); + void clear(); + void idle_loop(); + void start_searching(); + void wait_for_search_finished(); + size_t id() const { return idx; } + + size_t pvIdx, pvLast; + std::atomic nodes, tbHits, bestMoveChanges; + int selDepth, nmpMinPly; + Value bestValue, optimism[COLOR_NB]; + + Position rootPos; + StateInfo rootState; + Search::RootMoves rootMoves; + Depth rootDepth, completedDepth; + Value rootDelta; + Value rootSimpleEval; + CounterMoveHistory counterMoves; + ButterflyHistory mainHistory; + CapturePieceToHistory captureHistory; + ContinuationHistory continuationHistory[2][2]; + PawnHistory pawnHistory; }; -/// MainThread is a derived class specific for main thread - -struct MainThread : public Thread { +// MainThread is a derived class specific for main thread +struct MainThread: public Thread { - using Thread::Thread; + using Thread::Thread; - void search() override; - void check_time(); + void search() override; + void check_time(); - double previousTimeReduction; - Value bestPreviousScore; - Value iterValue[4]; - int callsCnt; - bool stopOnPonderhit; - std::atomic_bool ponder; + double previousTimeReduction; + Value bestPreviousScore; + Value bestPreviousAverageScore; + Value iterValue[4]; + int callsCnt; + bool stopOnPonderhit; + std::atomic_bool ponder; }; -/// ThreadPool struct handles all the threads-related stuff like init, starting, -/// parking and, most importantly, launching a thread. All the access to threads -/// is done through this class. +// ThreadPool struct handles all the threads-related stuff like init, starting, +// parking and, most importantly, launching a thread. All the access to threads +// is done through this class. +struct ThreadPool { -struct ThreadPool : public std::vector { + void start_thinking(Position&, StateListPtr&, const Search::LimitsType&, bool = false); + void clear(); + void set(size_t); - void start_thinking(Position&, StateListPtr&, const Search::LimitsType&, bool = false); - void clear(); - void set(size_t); + MainThread* main() const { return static_cast(threads.front()); } + uint64_t nodes_searched() const { return accumulate(&Thread::nodes); } + uint64_t tb_hits() const { return accumulate(&Thread::tbHits); } + Thread* get_best_thread() const; + void start_searching(); + void wait_for_search_finished() const; - MainThread* main() const { return static_cast(front()); } - uint64_t nodes_searched() const { return accumulate(&Thread::nodes); } - uint64_t tb_hits() const { return accumulate(&Thread::tbHits); } - Thread* get_best_thread() const; - void start_searching(); - void wait_for_search_finished() const; + std::atomic_bool stop, increaseDepth; - std::atomic_bool stop, increaseDepth; + auto cbegin() const noexcept { return threads.cbegin(); } + auto begin() noexcept { return threads.begin(); } + auto end() noexcept { return threads.end(); } + auto cend() const noexcept { return threads.cend(); } + auto size() const noexcept { return threads.size(); } + auto empty() const noexcept { return threads.empty(); } -private: - StateListPtr setupStates; + private: + StateListPtr setupStates; + std::vector threads; - uint64_t accumulate(std::atomic Thread::* member) const { + uint64_t accumulate(std::atomic Thread::*member) const { - uint64_t sum = 0; - for (Thread* th : *this) - sum += (th->*member).load(std::memory_order_relaxed); - return sum; - } + uint64_t sum = 0; + for (Thread* th : threads) + sum += (th->*member).load(std::memory_order_relaxed); + return sum; + } }; extern ThreadPool Threads; -#endif // #ifndef THREAD_H_INCLUDED +} // namespace Stockfish + +#endif // #ifndef THREAD_H_INCLUDED