_mtx_lock_spin_cookie
_mtx_lock_spin_cookie(volatile uintptr_t *c, uintptr_t v)
void _mtx_lock_spin_cookie(volatile uintptr_t *c, uintptr_t v, int opts,
void _mtx_lock_spin_cookie(volatile uintptr_t *c, uintptr_t v);
_mtx_lock_spin_cookie(&(m)->mtx_lock, v, o, f, l)
_mtx_lock_spin_cookie(&(m)->mtx_lock, v)