/*
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
- Copyright (C) 2008-2013 Marco Costalba, Joona Kiiski, Tord Romstad
+ Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, 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
#ifndef THREAD_H_INCLUDED
#define THREAD_H_INCLUDED
+#include <bitset>
#include <vector>
#include "material.h"
#include "position.h"
#include "search.h"
-const int MAX_THREADS = 64; // Because SplitPoint::slavesMask is a uint64_t
+const int MAX_THREADS = 128;
const int MAX_SPLITPOINTS_PER_THREAD = 8;
struct Mutex {
Depth depth;
Value beta;
int nodeType;
- Move threatMove;
bool cutNode;
// Const pointers to shared data
// Shared data
Mutex mutex;
- volatile uint64_t slavesMask;
- volatile int64_t nodes;
+ std::bitset<MAX_THREADS> slavesMask;
+ volatile uint64_t nodes;
volatile Value alpha;
volatile Value bestValue;
volatile Move bestMove;
struct ThreadBase {
- ThreadBase() : exit(false) {}
+ ThreadBase() : handle(NativeHandle()), exit(false) {}
virtual ~ThreadBase() {}
virtual void idle_loop() = 0;
void notify_one();
template <bool Fake>
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);
+ Depth depth, int moveCount, MovePicker* movePicker, int nodeType, bool cutNode);
SplitPoint splitPoints[MAX_SPLITPOINTS_PER_THREAD];
Material::Table materialTable;
};
struct TimerThread : public ThreadBase {
- TimerThread() : msec(0) {}
+ TimerThread() : run(false) {}
virtual void idle_loop();
- int msec;
+ bool run;
+ static const int Resolution = 5; // msec between two check_time() calls
};
/// ThreadPool struct handles all the threads related stuff like init, starting,
-/// parking and, the most important, launching a slave thread at a split point.
+/// parking and, most importantly, launching a slave thread at a split point.
/// All the access to shared thread data is done through this class.
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.
+ void exit(); // be initialized and are valid during the whole thread lifetime.
MainThread* main() { return static_cast<MainThread*>((*this)[0]); }
void read_uci_options();
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&);
+ void start_thinking(const Position&, const Search::LimitsType&, Search::StateStackPtr&);
bool sleepWhileIdle;
Depth minimumSplitDepth;
- size_t maxThreadsPerSplitPoint;
Mutex mutex;
ConditionVariable sleepCondition;
TimerThread* timer;