#include "position.h"
#include "search.h"
-const int MAX_THREADS = 128;
-const int MAX_SPLITPOINTS_PER_THREAD = 8;
+struct Thread;
+
+const size_t MAX_THREADS = 128;
+const size_t MAX_SPLITPOINTS_PER_THREAD = 8;
+const size_t MAX_SLAVES_PER_SPLITPOINT = 4;
+
+/// Mutex and ConditionVariable struct are wrappers of the low level locking
+/// machinery and are modeled after the corresponding C++11 classes.
struct Mutex {
Mutex() { lock_init(l); }
WaitCondition c;
};
-struct Thread;
+
+/// SplitPoint struct stores information shared by the threads searching in
+/// parallel below the same split point. It is populated at splitting time.
struct SplitPoint {
// Const data after split point has been setup
const Position* pos;
Search::Stack* ss;
- Thread* masterThread;
+ Thread* master;
Depth depth;
Value beta;
int nodeType;
MovePicker* movePicker;
SplitPoint* parentSplitPoint;
- // Shared data
+ // Shared variable data
Mutex mutex;
std::bitset<MAX_THREADS> slavesMask;
volatile bool allSlavesSearching;
Depth depth, int moveCount, MovePicker* movePicker, int nodeType, bool cutNode);
SplitPoint splitPoints[MAX_SPLITPOINTS_PER_THREAD];
+ Pawns::Table pawnsTable;
Material::Table materialTable;
Endgames endgames;
- Pawns::Table pawnsTable;
Position* activePosition;
size_t idx;
int maxPly;
SplitPoint* volatile activeSplitPoint;
- volatile int splitPointsSize;
+ volatile size_t splitPointsSize;
volatile bool searching;
};
};
struct TimerThread : public ThreadBase {
+
+ static const int Resolution = 5; // Millisec between two check_time() calls
+
TimerThread() : run(false) {}
virtual void idle_loop();
+
bool run;
- static const int Resolution = 5; // msec between two check_time() calls
};
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 are valid during the whole thread lifetime.
+ void init(); // No c'tor and d'tor, threads rely on globals that should be
+ void exit(); // initialized and are valid during the whole thread lifetime.
- MainThread* main() { return static_cast<MainThread*>((*this)[0]); }
+ MainThread* main() { return static_cast<MainThread*>(at(0)); }
void read_uci_options();
Thread* available_slave(const Thread* master) const;
void wait_for_think_finished();