};
+/// ThreadBase struct is the base of the hierarchy from where we derive all the
+/// specialized thread classes.
+
+struct ThreadBase {
+
+ ThreadBase() : exit(false) {}
+ virtual ~ThreadBase() {}
+ virtual void idle_loop() = 0;
+ void notify_one();
+ void wait_for(volatile const bool& b);
+
+ Mutex mutex;
+ ConditionVariable sleepCondition;
+ NativeHandle handle;
+ volatile 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
/// 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.
-struct Thread {
+struct Thread : public ThreadBase {
Thread();
- virtual ~Thread();
-
virtual void idle_loop();
- void notify_one();
bool cutoff_occurred() const;
- bool is_available_to(Thread* master) const;
- void wait_for(volatile const bool& b);
+ bool available_to(const Thread* master) const;
template <bool Fake>
- void split(Position& pos, Search::Stack* ss, Value alpha, Value beta, Value* bestValue, Move* bestMove,
+ void split(Position& pos, const Search::Stack* ss, Value alpha, Value beta, Value* bestValue, Move* bestMove,
Depth depth, Move threatMove, int moveCount, MovePicker* movePicker, int nodeType, bool cutNode);
SplitPoint splitPoints[MAX_SPLITPOINTS_PER_THREAD];
Position* activePosition;
size_t idx;
int maxPly;
- Mutex mutex;
- ConditionVariable sleepCondition;
- NativeHandle handle;
SplitPoint* volatile activeSplitPoint;
volatile int splitPointsSize;
volatile bool searching;
- volatile bool exit;
};
-/// MainThread and TimerThread are sublassed from Thread to characterize the two
+/// MainThread and TimerThread are derived classes used to characterize the two
/// special threads: the main one and the recurring timer.
struct MainThread : public Thread {
volatile bool thinking;
};
-struct TimerThread : public Thread {
- TimerThread() : msec(0) {}
+struct TimerThread : public ThreadBase {
+ TimerThread() : run(false) {}
virtual void idle_loop();
- int msec;
+ bool run;
+ static const int Resolution = 5; // msec between two check_time() calls
};
void init(); // No c'tor and d'tor, threads rely on globals that should
void exit(); // be initialized and valid during the whole thread lifetime.
- MainThread* main_thread() { return static_cast<MainThread*>((*this)[0]); }
+ MainThread* main() { return static_cast<MainThread*>((*this)[0]); }
void read_uci_options();
- Thread* available_slave(Thread* master) const;
+ Thread* available_slave(const Thread* master) const;
void wait_for_think_finished();
void start_thinking(const Position&, const Search::LimitsType&,
const std::vector<Move>&, Search::StateStackPtr&);