Retire linear imbalance

[stockfish] / src / thread.h

diff --git a/src/thread.h b/src/thread.h
index 6cceca7244f59b44205105aa26f3595217751ec4..8181163ec1b7516dec0c184f193de130920ea3f3 100644 (file)
--- a/src/thread.h
+++ b/src/thread.h
@@ -2,6 +2,7 @@
   Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
   Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
+  Copyright (C) 2015-2016 Marco Costalba, Joona Kiiski, Gary Linscott, Tord Romstad
 
   Stockfish is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -35,65 +36,58 @@
 #include "thread_win32.h"
 
 
-/// ThreadBase struct is the base of the hierarchy from where we derive all the
-/// specialized thread classes.
+/// Thread struct keeps together all the thread-related stuff. 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 ThreadBase : public std::thread {
-
-  ThreadBase() { exit = false; }
-  virtual ~ThreadBase() = default;
-  virtual void idle_loop() = 0;
-  void notify_one();
-  void wait(std::atomic_bool& b);
-  void wait_while(std::atomic_bool& b);
+class Thread {
 
+  std::thread nativeThread;
   Mutex mutex;
   ConditionVariable sleepCondition;
-  std::atomic_bool exit;
-};
-
-
-/// Thread struct keeps together all the thread related stuff like locks, state,
-/// history and countermoves tables. 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 : public ThreadBase {
+  bool exit, searching;
 
+public:
   Thread();
-  virtual void idle_loop();
-  void search(bool isMainThread = false);
+  virtual ~Thread();
+  virtual void search();
+  void idle_loop();
+  void start_searching(bool resume = false);
+  void wait_for_search_finished();
+  void wait(std::atomic_bool& b);
 
   Pawns::Table pawnsTable;
   Material::Table materialTable;
   Endgames endgames;
   size_t idx, PVIdx;
   int maxPly, callsCnt;
-  std::atomic_bool searching, resetCallsCnt;
 
   Position rootPos;
-  Search::RootMoveVector rootMoves;
+  Search::RootMoves rootMoves;
   Depth rootDepth;
   HistoryStats history;
-  MovesStats counterMoves;
+  MoveStats counterMoves;
+  FromToStats fromTo;
   Depth completedDepth;
+  std::atomic_bool resetCalls;
 };
 
 
-/// MainThread is a derived classes used to characterize the the main one
+/// MainThread is a derived class with a specific overload for the main thread
 
 struct MainThread : public Thread {
-  MainThread() { thinking = true; } // Avoid a race with start_thinking()
-  virtual void idle_loop();
-  void join();
-  void think();
-  std::atomic_bool thinking;
+  virtual void search();
+
+  bool easyMovePlayed, failedLow;
+  double bestMoveChanges;
+  Value previousScore;
 };
 
 
-/// ThreadPool struct handles all the threads related stuff like init, starting,
-/// parking and, most importantly, launching a thread.
-/// All the access to shared thread data is done through this class.
+/// ThreadPool struct handles all the threads-related stuff like init, starting,
+/// parking and, most importantly, launching a thread. All the access to threads
+/// data is done through this class.
 
 struct ThreadPool : public std::vector<Thread*> {
 
@@ -101,9 +95,12 @@ struct ThreadPool : public std::vector<Thread*> {
   void exit(); // be initialized and valid during the whole thread lifetime.
 
   MainThread* main() { return static_cast<MainThread*>(at(0)); }
+  void start_thinking(Position&, StateListPtr&, const Search::LimitsType&);
   void read_uci_options();
-  void start_thinking(const Position&, const Search::LimitsType&, Search::StateStackPtr&);
   int64_t nodes_searched();
+
+private:
+  StateListPtr setupStates;
 };
 
 extern ThreadPool Threads;