*
   * <p>Although all tasks are immediately executed in the thread that submitted the task, this
   * {@code ExecutorService} imposes a small locking overhead on each task submission in order to
   * implement shutdown and termination behavior.
   *
   * <p>Because of the nature of single-thread execution, the methods {@code scheduleAtFixedRate}

   *
   * <p>Although all tasks are immediately executed in the thread that submitted the task, this
   * {@code ExecutorService} imposes a small locking overhead on each task submission in order to
   * implement shutdown and termination behavior.
   *
   * <p>Because of the nature of single-thread execution, the methods {@code scheduleAtFixedRate}

        assertTrue(resp instanceof ServerMessageBlock2);
    }

    @Test
    @DisplayName("Should return correct OVERHEAD constant value")
    void testOverheadConstant() {
        // Then
        assertEquals(Smb2Constants.SMB2_HEADER_LENGTH + 16, Smb2ReadResponse.OVERHEAD);
    }

    @Test
    @DisplayName("Should initially have zero data length")
    void testInitialDataLength() {
        // Then

            assertArrayEquals(newFileId, Arrays.copyOfRange(buffer, 16, 32));
        }

        @Test
        @DisplayName("Should maintain constant overhead")
        void testOverheadConstant() {
            assertEquals(Smb2Constants.SMB2_HEADER_LENGTH + 48, Smb2WriteRequest.OVERHEAD);
        }

        @Test
        @DisplayName("Should handle boundary conditions")
        void testBoundaryConditions() {

        this.maxReadSize =
                Math.min(maxBufferSize - Smb2ReadResponse.OVERHEAD, Math.min(tc.getConfig().getReceiveBufferSize(), this.maxReadSize))
                        & ~0x7;
        this.maxWriteSize =
                Math.min(maxBufferSize - Smb2WriteRequest.OVERHEAD, Math.min(tc.getConfig().getSendBufferSize(), this.maxWriteSize)) & ~0x7;

        super(config, SMB2_QUERY_DIRECTORY);
        this.outputBufferLength =
                Math.min(config.getMaximumBufferSize(), config.getListSize()) - Smb2QueryDirectoryResponse.OVERHEAD & ~0x7;
        this.fileId = fileId;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.smb2.RequestWithFileId#setFileId(byte[])
     */
    @Override

        assertTrue(response instanceof ServerMessageBlock2);
    }

    @Test
    @DisplayName("Test OVERHEAD constant value")
    void testOverheadConstant() {
        assertEquals(72, Smb2QueryInfoResponse.OVERHEAD);
        assertEquals(Smb2Constants.SMB2_HEADER_LENGTH + 8, Smb2QueryInfoResponse.OVERHEAD);
    }

    @ParameterizedTest
    @CsvSource({ "1, 6", // SMB2_0_INFO_FILE, FILE_INTERNAL_INFO

        System.out.printf("  Avg release time: %.2f ns%n", avgReleaseTimeNs);

        // Verify O(1) performance - should be reasonably fast (allowing for JVM overhead)
        assertTrue(avgAllocTimeNs < 10000, "Average allocation should be under 10000ns (O(1) performance)");
        assertTrue(avgReleaseTimeNs < 10000, "Average release should be under 10000ns (O(1) performance)");

 */

package jcifs.smb1.smb1;

import jcifs.smb1.Config;

/**
 * Buffer cache implementation for SMB1 protocol operations.
 * Manages a pool of byte buffers to reduce garbage collection overhead.
 *
 * Performance optimizations:
 * - Uses ConcurrentLinkedQueue for O(1) operations
 * - Lock-free operations for better concurrency
 * - Proper buffer validation and limits
 */
public class BufferCache {

 * type is determined by the crawler data serializer configuration.
 * </p>
 * <p>
 * The class is thread-safe and uses ThreadLocal to maintain Kryo instances
 * per thread to avoid synchronization overhead.
 * </p>
 *
 */
public class DataSerializer {

    /** Logger for this class. */
    private static final Logger logger = LogManager.getLogger(DataSerializer.class);