1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package java.lang.invoke;
  26 
  27 import java.nio.Buffer;
  28 import java.nio.ByteBuffer;
  29 
  30 import static java.lang.invoke.MethodHandleStatics.UNSAFE;
  31 
  32 /**
  33  * The base class for generated byte array and byte buffer view
  34  * implementations
  35  */
  36 abstract class VarHandleByteArrayBase {
  37     // Buffer.address
  38     static final long BUFFER_ADDRESS
  39             = UNSAFE.objectFieldOffset(Buffer.class, "address");
  40 
  41     // Buffer.limit
  42     static final long BUFFER_LIMIT
  43             = UNSAFE.objectFieldOffset(Buffer.class, "limit");
  44 
  45     // ByteBuffer.hb
  46     static final long BYTE_BUFFER_HB
  47             = UNSAFE.objectFieldOffset(ByteBuffer.class, "hb");
  48 
  49     // ByteBuffer.isReadOnly
  50     static final long BYTE_BUFFER_IS_READ_ONLY
  51             = UNSAFE.objectFieldOffset(ByteBuffer.class, "isReadOnly");
  52 
  53     static final boolean BE = UNSAFE.isBigEndian();
  54 
  55     static IllegalStateException newIllegalStateExceptionForMisalignedAccess(int index) {
  56         return new IllegalStateException("Misaligned access at index: " + index);
  57     }
  58 }