Thread::Thread(size_t n) : idx(n), stdThread(&Thread::idle_loop, this) {
wait_for_search_finished();
+ clear(); // Zero-init histories (based on std::array)
}
}
+/// Thread::clear() reset histories, usually before a new game
+
+void Thread::clear() {
+
+ counterMoves.fill(MOVE_NONE);
+ mainHistory.fill(0);
+
+ for (auto& to : contHistory)
+ for (auto& h : to)
+ h.fill(0);
+
+ contHistory[NO_PIECE][0].fill(Search::CounterMovePruneThreshold - 1);
+}
+
/// Thread::start_searching() wakes up the thread that will start the search
void Thread::start_searching() {
/// ThreadPool::init() creates and launches the threads that will go
-/// immediately to sleep in idle_loop. We cannot use the c'tor because
+/// immediately to sleep in idle_loop. We cannot use the constructor because
/// Threads is a static object and we need a fully initialized engine at
/// this point due to allocation of Endgames in the Thread constructor.