Big renaming in thread stuff

[stockfish] / src / thread.h

diff --git a/src/thread.h b/src/thread.h
index 5feab00072be92c2505f635c0d0800c2ca935e8c..793a3c606797c573131fe5f59cbc4e6c915c4b6e 100644 (file)
--- a/src/thread.h
+++ b/src/thread.h
@@ -28,7 +28,7 @@
 #include "position.h"
 #include "search.h"
 
-const int MAX_THREADS = 32;
+const int MAX_THREADS = 64; // Because SplitPoint::slavesMask is a uint64_t
 const int MAX_SPLITPOINTS_PER_THREAD = 8;
 
 struct Mutex {
@@ -56,7 +56,7 @@ private:
   WaitCondition c;
 };
 
-class Thread;
+struct Thread;
 
 struct SplitPoint {
 
@@ -75,6 +75,7 @@ struct SplitPoint {
 
   // Shared data
   Mutex mutex;
+  Position* activePositions[MAX_THREADS];
   volatile uint64_t slavesMask;
   volatile int64_t nodes;
   volatile Value alpha;
@@ -90,36 +91,46 @@ struct SplitPoint {
 /// 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.
 
-class Thread {
+struct Thread {
 
-  typedef void (Thread::* Fn) (); // Pointer to member function
+  Thread();
+  virtual ~Thread();
 
-public:
-  Thread(Fn fn);
- ~Thread();
-
-  void wake_up();
+  virtual void idle_loop();
+  void notify_one();
   bool cutoff_occurred() const;
   bool is_available_to(Thread* master) const;
-  void idle_loop();
-  void main_loop();
-  void timer_loop();
-  void wait_for_stop_or_ponderhit();
+  void wait_for(volatile const bool& b);
 
   SplitPoint splitPoints[MAX_SPLITPOINTS_PER_THREAD];
-  MaterialTable materialTable;
-  PawnTable pawnTable;
+  Material::Table materialTable;
+  Endgames endgames;
+  Pawns::Table pawnsTable;
   size_t idx;
   int maxPly;
   Mutex mutex;
   ConditionVariable sleepCondition;
   NativeHandle handle;
-  Fn start_fn;
   SplitPoint* volatile curSplitPoint;
   volatile int splitPointsCnt;
-  volatile bool is_searching;
-  volatile bool do_sleep;
-  volatile bool do_exit;
+  volatile bool searching;
+  volatile bool exit;
+};
+
+
+/// MainThread and TimerThread are sublassed from Thread to charaterize the two
+/// special threads: the main one and the recurring timer.
+
+struct MainThread : public Thread {
+  MainThread() : thinking(true) {} // Avoid a race with start_thinking()
+  virtual void idle_loop();
+  volatile bool thinking;
+};
+
+struct TimerThread : public Thread {
+  TimerThread() : msec(0) {}
+  virtual void idle_loop();
+  int msec;
 };
 
 
@@ -130,37 +141,37 @@ public:
 class ThreadPool {
 
 public:
-  void init(); // No c'tor, Threads object is global and engine shall be fully initialized
- ~ThreadPool();
+  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.
 
   Thread& operator[](size_t id) { return *threads[id]; }
-  bool use_sleeping_threads() const { return useSleepingThreads; }
-  int min_split_depth() const { return minimumSplitDepth; }
   size_t size() const { return threads.size(); }
-  Thread* main_thread() { return threads[0]; }
+  MainThread* main_thread() { return static_cast<MainThread*>(threads[0]); }
+  TimerThread* timer_thread() { return timer; }
 
-  void wake_up() const;
-  void sleep() const;
   void read_uci_options();
   bool available_slave_exists(Thread* master) const;
-  void set_timer(int msec);
-  void wait_for_search_finished();
-  void start_searching(const Position& pos, const Search::LimitsType& limits,
-                       const std::vector<Move>& searchMoves);
+  void wait_for_think_finished();
+  void start_thinking(const Position&, const Search::LimitsType&,
+                       const std::vector<Move>&, Search::StateStackPtr&);
 
   template <bool Fake>
   Value split(Position& pos, Search::Stack* ss, Value alpha, Value beta, Value bestValue, Move* bestMove,
-              Depth depth, Move threatMove, int moveCount, MovePicker* mp, int nodeType);
+              Depth depth, Move threatMove, int moveCount, MovePicker& mp, int nodeType);
+
+  bool sleepWhileIdle;
+  Depth minimumSplitDepth;
+
 private:
-  friend class Thread;
+  friend struct Thread;
+  friend struct MainThread;
+  friend void check_time();
 
   std::vector<Thread*> threads;
-  Thread* timer;
+  TimerThread* timer;
   Mutex mutex;
   ConditionVariable sleepCondition;
-  Depth minimumSplitDepth;
   int maxThreadsPerSplitPoint;
-  bool useSleepingThreads;
 };
 
 extern ThreadPool Threads;