fssh_atomic_test_and_set64
int64_t fssh_atomic_test_and_set64(int64_t *value, int64_t newValue,
if (fssh_atomic_test_and_set64((int64_t *)&vnode->mandatory_locked_by,
if (fssh_atomic_test_and_set64((int64_t *)&vnode->mandatory_locked_by,