const size_t MAX_SPLITPOINTS_PER_THREAD = 8;
const size_t MAX_SLAVES_PER_SPLITPOINT = 4;
+/// Spinlock class wraps low level atomic operations to provide spin lock functionality
+
+class Spinlock {
+
+ std::atomic_flag lock;
+
+public:
+ Spinlock() { std::atomic_flag_clear(&lock); }
+ void acquire() { while (lock.test_and_set(std::memory_order_acquire)) {} }
+ void release() { lock.clear(std::memory_order_release); }
+};
+
+
/// SplitPoint struct stores information shared by the threads searching in
/// parallel below the same split point. It is populated at splitting time.
SplitPoint* parentSplitPoint;
// Shared variable data
- std::mutex mutex;
+ Spinlock spinlock;
std::bitset<MAX_THREADS> slavesMask;
volatile bool allSlavesSearching;
volatile uint64_t nodes;
};
-/// Spinlock class wraps low level atomic operations to provide spin lock functionality
-
-class Spinlock {
-
- std::atomic_flag lock;
-
-public:
- Spinlock() { std::atomic_flag_clear(&lock); }
- void acquire() { while (lock.test_and_set(std::memory_order_acquire)) {} }
- void release() { lock.clear(std::memory_order_release); }
-};
-
-
/// ThreadBase struct is the base of the hierarchy from where we derive all the
/// specialized thread classes.
void start_thinking(const Position&, const Search::LimitsType&, Search::StateStackPtr&);
Depth minimumSplitDepth;
- std::mutex mutex;
+ Spinlock spinlock;
std::condition_variable sleepCondition;
TimerThread* timer;
};