X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fthread.h;h=86e5565f2e3363667bbf07a34a777fdec56f5b70;hb=24df0f72c0bb1f6fcc28882995be41b17772ce3e;hp=d12ec845c01f4bc4a288bd6bfe076b8652ca9b5b;hpb=0ff91e16da5d66d7b47274203d460ff0144f1e39;p=stockfish
diff --git a/src/thread.h b/src/thread.h
index d12ec845..86e5565f 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -1,7 +1,8 @@
/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2009 Marco Costalba
+ Copyright (C) 2008-2015 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2015-2017 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
@@ -17,64 +18,92 @@
along with this program. If not, see .
*/
-
-#if !defined(THREAD_H_INCLUDED)
+#ifndef THREAD_H_INCLUDED
#define THREAD_H_INCLUDED
+#include
+#include
+#include
+#include
+#include
-////
-//// Includes
-////
-
-#include "lock.h"
+#include "material.h"
#include "movepick.h"
+#include "pawns.h"
#include "position.h"
#include "search.h"
+#include "thread_win32.h"
+
+
+/// 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.
+
+class Thread {
+
+ std::thread nativeThread;
+ Mutex mutex;
+ ConditionVariable sleepCondition;
+ bool exit, searching;
+
+public:
+ Thread();
+ virtual ~Thread();
+ virtual void search();
+ void idle_loop();
+ void start_searching(bool resume = false);
+ void wait_for_search_finished();
+ void wait(std::atomic_bool& condition);
+
+ Pawns::Table pawnsTable;
+ Material::Table materialTable;
+ Endgames endgames;
+ size_t idx, PVIdx;
+ int maxPly, callsCnt;
+ uint64_t tbHits;
+
+ Position rootPos;
+ Search::RootMoves rootMoves;
+ Depth rootDepth;
+ Depth completedDepth;
+ std::atomic_bool resetCalls;
+ MoveStats counterMoves;
+ HistoryStats history;
+ CounterMoveHistoryStats counterMoveHistory;
+};
+
+
+/// MainThread is a derived class with a specific overload for the main thread
+struct MainThread : public Thread {
+ virtual void search();
-////
-//// Constants and variables
-////
-
-const int THREAD_MAX = 8;
-const int ACTIVE_SPLIT_POINTS_MAX = 8;
-
-
-////
-//// Types
-////
-
-struct SplitPoint {
- SplitPoint *parent;
- const Position* pos;
- SearchStack sstack[THREAD_MAX][PLY_MAX_PLUS_2];
- SearchStack *parentSstack;
- int ply;
- Depth depth;
- volatile Value alpha, beta, bestValue, futilityValue;
- bool pvNode;
- int master, slaves[THREAD_MAX];
- Lock lock;
- MovePicker *mp;
- volatile int moves;
- volatile int cpus;
- bool finished;
+ bool easyMovePlayed, failedLow;
+ double bestMoveChanges;
+ Value previousScore;
};
-struct Thread {
- SplitPoint *splitPoint;
- int activeSplitPoints;
- uint64_t nodes;
- uint64_t betaCutOffs[2];
- bool failHighPly1;
- volatile bool stop;
- volatile bool running;
- volatile bool idle;
- volatile bool workIsWaiting;
- volatile bool printCurrentLine;
- unsigned char pad[64]; // set some distance among local data for each thread
+/// 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 {
+
+ void init(); // No constructor and destructor, threads rely on globals that should
+ void exit(); // be initialized and valid during the whole thread lifetime.
+
+ MainThread* main() { return static_cast(at(0)); }
+ void start_thinking(Position&, StateListPtr&, const Search::LimitsType&);
+ void read_uci_options();
+ uint64_t nodes_searched() const;
+ uint64_t tb_hits() const;
+
+private:
+ StateListPtr setupStates;
};
+extern ThreadPool Threads;
-#endif // !defined(THREAD_H_INCLUDED)
+#endif // #ifndef THREAD_H_INCLUDED