For branch C++11, that doe snot run on fishtest,
there is no need of this kludge, let only master
have it.
No functional change.
const size_t MAX_SPLITPOINTS_PER_THREAD = 8;
const size_t MAX_SLAVES_PER_SPLITPOINT = 4;
-#if !defined(NO_SPINLOCK)
+
/// Spinlock class wraps low level atomic operations to provide a spin lock
class Spinlock {
void release() { lock.store(1, std::memory_order_release); }
};
-#else
-
-class Spinlock {
-
- std::mutex mutex;
-
-public:
- void acquire() { mutex.lock(); }
- void release() { mutex.unlock(); }
-};
-
-#endif
/// SplitPoint struct stores information shared by the threads searching in
/// parallel below the same split point. It is populated at splitting time.
/// -DNO_PREFETCH | Disable use of prefetch asm-instruction. You may need this to
/// | run on some very old machines.
///
-/// -DNO_SPINLOCK | Use mutex instead of spinlocks. This is much slower, so you
-/// | really don't want to do this in general case.
-///
/// -DUSE_POPCNT | Add runtime support for use of popcnt asm-instruction. Works
/// | only in 64-bit mode and requires hardware with popcnt support.
///