*
 * Manages pools of pre-registered memory regions to avoid the overhead
 * of frequent registration/deregistration during RDMA operations.
 */
public class RdmaBufferManager implements AutoCloseable {

    private static final Logger log = LoggerFactory.getLogger(RdmaBufferManager.class);

    private final RdmaProvider provider;
    private final ConcurrentLinkedQueue<RdmaMemoryRegion> availableSendRegions;

import jcifs.internal.smb2.rdma.tcp.TcpMemoryRegion;

/**
 * Unit tests for RDMA buffer manager
 */
public class RdmaBufferManagerTest {

    @Mock
    private RdmaProvider mockProvider;

    private RdmaBufferManager bufferManager;
    private AutoCloseable mocks;

    @BeforeEach
    public void setUp() throws Exception {
        mocks = MockitoAnnotations.openMocks(this);

    private static final Logger log = LoggerFactory.getLogger(RdmaTransport.class);

    private final SmbTransportInternal delegate;
    private final RdmaProvider rdmaProvider;
    private final RdmaBufferManager bufferManager;
    private final RdmaStatistics statistics;
    private RdmaConnection rdmaConnection;
    private final Object connectionLock = new Object();

    /**