X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fthread.h;h=c1b635b7ea4db61dfca33ed0ee3423e3eeefb862;hb=750dfa0521472e86c67f870fe7ca413d670cafe2;hp=64804d45e19f9b882010ff1a0751a53cc3fade31;hpb=8e71ee7ec6c1634af5d17f8ba43049f85ef42c53;p=stockfish
diff --git a/src/thread.h b/src/thread.h
index 64804d45..c1b635b7 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) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+ 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
@@ -17,61 +18,95 @@
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
+#include
-#include "lock.h"
+#include "material.h"
#include "movepick.h"
+#include "pawns.h"
#include "position.h"
#include "search.h"
+#include "thread_win32.h"
-const int MAX_THREADS = 32;
-const int MAX_ACTIVE_SPLIT_POINTS = 8;
-
-struct SplitPoint {
-
- // Const data after splitPoint has been setup
- SplitPoint* parent;
- const Position* pos;
- Depth depth;
- bool pvNode;
- Value beta;
- int ply;
- int master;
- Move threatMove;
-
- // Const pointers to shared data
- MovePicker* mp;
- SearchStack* ss;
-
- // Shared data
- Lock lock;
- volatile int64_t nodes;
- volatile Value alpha;
- volatile Value bestValue;
- volatile int moveCount;
- volatile bool betaCutoff;
- volatile int slaves[MAX_THREADS];
+
+/// 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 selDepth;
+ std::atomic nodes, tbHits;
+
+ Position rootPos;
+ Search::RootMoves rootMoves;
+ Depth rootDepth;
+ Depth completedDepth;
+ CounterMoveHistory counterMoves;
+ ButterflyHistory mainHistory;
+ ContinuationHistory contHistory;
};
-// ThreadState type is used to represent thread's current state
-enum ThreadState
-{
- THREAD_INITIALIZING, // thread is initializing itself
- THREAD_SEARCHING, // thread is performing work
- THREAD_AVAILABLE, // thread is waiting for work
- THREAD_BOOKED, // other thread (master) has booked us as a slave
- THREAD_WORKISWAITING, // master has ordered us to start
- THREAD_TERMINATED // we are quitting and thread is terminated
+
+/// MainThread is a derived class with a specific overload for the main thread
+
+struct MainThread : public Thread {
+ virtual void search();
+ void check_time();
+
+ bool easyMovePlayed, failedLow;
+ double bestMoveChanges;
+ Value previousScore;
+ int callsCnt = 0;
};
-struct Thread {
- volatile ThreadState state;
- SplitPoint* volatile splitPoint;
- volatile int activeSplitPoints;
- SplitPoint splitPoints[MAX_ACTIVE_SPLIT_POINTS];
+
+/// 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;
+
+ std::atomic_bool stop, stopOnPonderhit;
+
+private:
+ StateListPtr setupStates;
};
-#endif // !defined(THREAD_H_INCLUDED)
+extern ThreadPool Threads;
+
+#endif // #ifndef THREAD_H_INCLUDED