LOCK_HELD_VALUE
#define LOCK_INIT_HELD(lp) (*(lp) = LOCK_HELD_VALUE)
#define MUTEX_TYPE_SPIN(lp) ((lp)->m_spin.m_dummylock == LOCK_HELD_VALUE)
#define LOCK_INIT_HELD(lp) (*(lp) = LOCK_HELD_VALUE)
#define MUTEX_TYPE_SPIN(lp) ((lp)->m_spin.m_dummylock == LOCK_HELD_VALUE)