X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fthread.h;h=56d000f3f94438275a83c88eb06ad7c2582fd921;hp=4ad08465ff30751ae3f89777ac57ff068d2485d5;hb=45b0aea875860e9f0fe2d0435ee6163906639194;hpb=002062ae934c1fae3e56157e8e7e6451b552ada5

diff --git a/src/thread.h b/src/thread.h
index 4ad08465..56d000f3 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -86,24 +86,38 @@ struct SplitPoint {
 };
 
 
+/// 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 is_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];
@@ -113,17 +127,13 @@ struct 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 {
@@ -132,7 +142,7 @@ struct MainThread : public Thread {
   volatile bool thinking;
 };
 
-struct TimerThread : public Thread {
+struct TimerThread : public ThreadBase {
   TimerThread() : msec(0) {}
   virtual void idle_loop();
   int msec;
@@ -148,9 +158,9 @@ struct ThreadPool : public std::vector<Thread*> {
   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&);