X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fthread.h;h=6cceca7244f59b44205105aa26f3595217751ec4;hb=e6eeb17aa6a79ab49b6c70fb783f54318d63add7;hp=abb7a22333800f4aa2d648290640f71261e749ab;hpb=00d9e9fd283b31e63389af091b158dbc3fedfc0e;p=stockfish diff --git a/src/thread.h b/src/thread.h index abb7a223..6cceca72 100644 --- a/src/thread.h +++ b/src/thread.h @@ -34,10 +34,6 @@ #include "search.h" #include "thread_win32.h" -struct Thread; - -const size_t MAX_THREADS = 128; - /// ThreadBase struct is the base of the hierarchy from where we derive all the /// specialized thread classes. @@ -48,17 +44,17 @@ struct ThreadBase : public std::thread { virtual ~ThreadBase() = default; virtual void idle_loop() = 0; void notify_one(); - void wait(std::atomic& b); - void wait_while(std::atomic& b); + void wait(std::atomic_bool& b); + void wait_while(std::atomic_bool& b); Mutex mutex; ConditionVariable sleepCondition; - std::atomic exit; + std::atomic_bool exit; }; -/// Thread struct keeps together all the thread related stuff like locks, state -/// and especially split points. We also use per-thread pawn and material hash +/// Thread struct keeps together all the thread related stuff like locks, state, +/// history and countermoves tables. We also 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. @@ -72,53 +68,42 @@ struct Thread : public ThreadBase { Material::Table materialTable; Endgames endgames; size_t idx, PVIdx; - int maxPly; - std::atomic searching; + int maxPly, callsCnt; + std::atomic_bool searching, resetCallsCnt; Position rootPos; Search::RootMoveVector rootMoves; Depth rootDepth; - Search::Stack stack[MAX_PLY+4]; HistoryStats history; MovesStats counterMoves; + Depth completedDepth; }; -/// MainThread and TimerThread are derived classes used to characterize the two -/// special threads: the main one and the recurring timer. +/// MainThread is a derived classes used to characterize the the main one struct MainThread : public Thread { MainThread() { thinking = true; } // Avoid a race with start_thinking() virtual void idle_loop(); void join(); void think(); - std::atomic thinking; -}; - -struct TimerThread : public ThreadBase { - - static const int Resolution = 5; // Millisec between two check_time() calls - - virtual void idle_loop(); - - bool run = false; + std::atomic_bool thinking; }; /// ThreadPool struct handles all the threads related stuff like init, starting, -/// parking and, most importantly, launching a slave thread at a split point. +/// parking and, most importantly, launching a thread. /// All the access to shared thread data is done through this class. struct ThreadPool : public std::vector { - void init(); // No c'tor and d'tor, threads rely on globals that should be - void exit(); // initialized and are valid during the whole thread lifetime. + void init(); // No constructor and destructor, threads rely on globals that should + void exit(); // be initialized and valid during the whole thread lifetime. MainThread* main() { return static_cast(at(0)); } void read_uci_options(); void start_thinking(const Position&, const Search::LimitsType&, Search::StateStackPtr&); int64_t nodes_searched(); - TimerThread* timer; }; extern ThreadPool Threads;