How to use

compare

method

in

org.apache.ignite.internal.util.offheap.unsafe.GridUnsafeMemory

/**
 * Compares memory.
 *
 * @param ptr Pointer.
 * @param bytes Bytes to compare.
 * @return {@code True} if equals.
 */
public static boolean compare(long ptr, byte[] bytes) {
  return compare(ptr, bytes, 0, bytes.length);
}

  /**
   * Checks if keys are equal.
   *
   * @param ptr Pointer.
   * @param keyBytes Key bytes to compare.
   * @param mem Memory.
   * @return {@code True} if equal.
   */
  static boolean keyEquals(long ptr, byte[] keyBytes, GridUnsafeMemory mem) {
    long len = readKeyLength(ptr, mem);
    return len == keyBytes.length && GridUnsafeMemory.compare(ptr + HEADER_SIZE, keyBytes);
  }
}

/**
 * @param s String.
 * @throws Exception If failed.
 */
public void checkCompare(String s) throws Exception {
  byte[] bytes = s.getBytes();
  int size = bytes.length + 8;
  GridUnsafeMemory mem = new GridUnsafeMemory(size);
  for (int i = 0; i < 8; i++) {
    long addr = mem.allocate(size);
    long ptr = addr + i;
    try {
      mem.writeBytes(ptr, bytes);
      assert mem.compare(ptr, bytes);
      byte[] read = mem.readBytes(ptr, bytes.length);
      assert Arrays.equals(bytes, read);
    }
    finally {
      mem.release(addr, size);
    }
  }
}

if (c2.offheap())
  return GridUnsafeMemory.compare(c1.curFieldPos + c1.ptr + off, c2.curFieldPos + c2.ptr + off, len);

/**
 * Compares memory.
 *
 * @param ptr Pointer.
 * @param bytes Bytes to compare.
 * @return {@code True} if equals.
 */
public static boolean compare(long ptr, byte[] bytes) {
  return compare(ptr, bytes, 0, bytes.length);
}

  /**
   * Checks if keys are equal.
   *
   * @param ptr Pointer.
   * @param keyBytes Key bytes to compare.
   * @param mem Memory.
   * @return {@code True} if equal.
   */
  static boolean keyEquals(long ptr, byte[] keyBytes, GridUnsafeMemory mem) {
    long len = readKeyLength(ptr, mem);
    return len == keyBytes.length && GridUnsafeMemory.compare(ptr + HEADER_SIZE, keyBytes);
  }
}

if (c2.offheap())
  return GridUnsafeMemory.compare(c1.curFieldPos + c1.ptr + off, c2.curFieldPos + c2.ptr + off, len);