9fb30a3740
Co-authored-by: Aleksey Shipilev <aleksey.shipilev@oracle.com> Reviewed-by: coffeys, mhaupt, vlivanov
71 lines
2.5 KiB
Java
71 lines
2.5 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.lang.invoke;
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import java.nio.Buffer;
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import java.nio.ByteBuffer;
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import static java.lang.invoke.MethodHandleStatics.UNSAFE;
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/**
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* The base class for generated byte array and byte buffer view
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* implementations
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*/
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abstract class VarHandleByteArrayBase {
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// Buffer.address
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static final long BUFFER_ADDRESS;
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// Buffer.limit
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static final long BUFFER_LIMIT;
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// ByteBuffer.hb
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static final long BYTE_BUFFER_HB;
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// ByteBuffer.isReadOnly
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static final long BYTE_BUFFER_IS_READ_ONLY;
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static {
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try {
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BUFFER_ADDRESS = UNSAFE.objectFieldOffset(
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Buffer.class.getDeclaredField("address"));
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BUFFER_LIMIT = UNSAFE.objectFieldOffset(
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Buffer.class.getDeclaredField("limit"));
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BYTE_BUFFER_HB = UNSAFE.objectFieldOffset(
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ByteBuffer.class.getDeclaredField("hb"));
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BYTE_BUFFER_IS_READ_ONLY = UNSAFE.objectFieldOffset(
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ByteBuffer.class.getDeclaredField("isReadOnly"));
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}
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catch (ReflectiveOperationException e) {
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throw new Error(e);
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}
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}
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static final boolean BE = UNSAFE.isBigEndian();
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static IllegalStateException newIllegalStateExceptionForMisalignedAccess(int index) {
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return new IllegalStateException("Misaligned access at index: " + index);
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}
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}
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