USE_SPIN_LOCK      59 gc/misc.c      #		if defined(USE_SPIN_LOCK)
USE_SPIN_LOCK    1335 gc/pthread_support.c #if !defined(USE_SPIN_LOCK) || defined(PARALLEL_MARK)
USE_SPIN_LOCK    1396 gc/pthread_support.c #if defined(USE_SPIN_LOCK)