-/// ThreadsManager class handles all the threads related stuff like init, starting,
-/// parking and, the most important, launching a slave thread at a split point.
-/// All the access to shared thread data is done through this class.
-
-class ThreadsManager {
- /* As long as the single ThreadsManager object is defined as a global we don't
- need to explicitly initialize to zero its data members because variables with
- static storage duration are automatically set to zero before enter main()
- */
-public:
- Thread& operator[](int threadID) { return threads[threadID]; }
- void init();
- void exit();
-
- bool use_sleeping_threads() const { return useSleepingThreads; }
- int min_split_depth() const { return minimumSplitDepth; }
- int size() const { return activeThreads; }
-
- void set_size(int cnt);
- void read_uci_options();
- bool available_slave_exists(int master) const;
- void set_timer(int msec);
- void stop_thinking();
- void start_thinking(const Position& pos, const Search::LimitsType& limits,
- const std::set<Move>& = std::set<Move>(), bool async = false);
-
- template <bool Fake>
- Value split(Position& pos, Search::Stack* ss, Value alpha, Value beta, Value bestValue,
- Depth depth, Move threatMove, int moveCount, MovePicker* mp, int nodeType);
-private:
- friend struct Thread;
-
- Thread threads[MAX_THREADS + 1]; // Last one is used as a timer
- Lock splitLock;
- WaitCondition sleepCond;
- Depth minimumSplitDepth;
- int maxThreadsPerSplitPoint;
- int activeThreads;
- bool useSleepingThreads;
+// 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 {
+
+ void start_thinking(Position&, StateListPtr&, const Search::LimitsType&, bool = false);
+ void clear();
+ void set(size_t);
+
+ MainThread* main() const { return static_cast<MainThread*>(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;
+
+ 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;
+ std::vector<Thread*> threads;
+
+ uint64_t accumulate(std::atomic<uint64_t> Thread::*member) const {
+
+ uint64_t sum = 0;
+ for (Thread* th : threads)
+ sum += (th->*member).load(std::memory_order_relaxed);
+ return sum;
+ }