// When - Get a buffer
        byte[] buffer = BufferCache.getBuffer();

        // Then - Buffer should have expected size
        assertNotNull(buffer, "Buffer should not be null");
        assertEquals(SmbComTransaction.TRANSACTION_BUF_SIZE, buffer.length, "Buffer should have TRANSACTION_BUF_SIZE");

        // The validation in getBuffer() ensures size is within bounds (0 < size <= 1MB)

        }

        return new byte[bufferSize];
    }

    static void getBuffers(final SmbComTransaction req, final SmbComTransactionResponse rsp) {
        req.txn_buf = getBuffer();
        rsp.txn_buf = getBuffer();
    }

    /**
     * Returns a buffer to the cache for reuse.
     *
     * Performance: O(1) operation with size limit check
     *

        verify(cfg, times(1)).getMaximumBufferSize();
        verifyNoMoreInteractions(cfg);

        // When cache is empty, getBuffer allocates a new buffer with configured size
        byte[] buf = impl.getBuffer();
        assertNotNull(buf, "getBuffer should never return null");
        assertEquals(5, buf.length, "Newly allocated buffer length should match config maximum size");
    }

            cache.getBuffer();
            cache.releaseBuffer(new byte[1024]);
        }, "All BufferCache interface methods should be callable");
    }

    @Test
    @DisplayName("getBuffer should return non-null byte array")
    void testGetBufferContract() {
        // Given
        byte[] expectedBuffer = new byte[1024];
        when(mockBufferCache.getBuffer()).thenReturn(expectedBuffer);

        this.cache = new Object[maxBuffers];
        this.bufferSize = maxSize;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.BufferCache#getBuffer()
     */
    @Override
    public byte[] getBuffer() {
        synchronized (this.cache) {
            byte[] buf;

            if (this.freeBuffers > 0) {
                for (int i = 0; i < this.cache.length; i++) {

    }

    /**
     * Get the underlying buffer
     *
     * @return memory buffer
     * @throws IllegalStateException if memory region has been invalidated
     */
    public ByteBuffer getBuffer() {
        if (!valid) {
            throw new IllegalStateException("Memory region invalidated");
        }
        return buffer;
    }

    /**
     * Get local memory key
     *

      OutputStream encodingStream = encoding.encoding.encodingStream(target);
      encodingStream.write(encodingInputs[i & INPUTS_MASK]);
      encodingStream.close();
      tmp += target.getBuffer().length();
    }
    return tmp;
  }

  @Benchmark
  public int decodingStream(int reps) throws IOException {
    int tmp = 0;
    byte[] target = new byte[n];
    for (int i = 0; i < reps; i++) {

        if (minSize <= sendBufferSize) {
            RdmaMemoryRegion region = availableSendRegions.poll();
            if (region != null) {
                region.getBuffer().clear();
                return region;
            }
        }

        // Allocate new buffer
        ByteBuffer buffer = ByteBuffer.allocateDirect(Math.max(minSize, sendBufferSize));

 */
public interface BufferCache {

    /**
     * Gets a buffer from the cache or creates a new one if the cache is empty.
     *
     * @return a buffer from the cache, or a new one
     */
    byte[] getBuffer();

    /**
     * Return a buffer to the cache
     *
     * @param buf the buffer to return to the cache for reuse
     */
    void releaseBuffer(byte[] buf);

        RdmaMemoryRegion region = provider.registerMemory(buffer, access);
        assertNotNull(region, "Memory region should not be null");
        assertEquals(buffer, region.getBuffer(), "Buffer should match");
        assertEquals(1024, region.getSize(), "Size should match buffer size");
        assertTrue(region.hasAccess(RdmaAccess.LOCAL_READ), "Should have local read access");