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view graal/com.oracle.max.graal.nodes/src/com/oracle/graal/nodes/java/CompareAndSwapNode.java @ 5060:4ed4295ce15f
Update import statements.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 08 Mar 2012 19:11:12 +0100 |
parents | ed559a528128 |
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/* * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.nodes.java; import com.oracle.max.cri.ci.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; /** * Represents an atomic compare-and-swap operation. If {@link #directResult} is true then the value read from the memory location is produced. * Otherwise the result is a boolean that contains whether the value matched the expected value. */ public class CompareAndSwapNode extends AbstractStateSplit implements LIRLowerable, MemoryCheckpoint { @Input private ValueNode object; @Input private ValueNode offset; @Input private ValueNode expected; @Input private ValueNode newValue; @Data private final boolean directResult; public ValueNode object() { return object; } public ValueNode offset() { return offset; } public ValueNode expected() { return expected; } public ValueNode newValue() { return newValue; } public boolean directResult() { return directResult; } public CompareAndSwapNode(ValueNode object, ValueNode offset, ValueNode expected, ValueNode newValue) { this(object, offset, expected, newValue, false); } public CompareAndSwapNode(ValueNode object, ValueNode offset, ValueNode expected, ValueNode newValue, boolean directResult) { super(StampFactory.forKind(directResult ? expected.kind().stackKind() : CiKind.Boolean.stackKind())); assert expected.kind() == newValue.kind(); this.object = object; this.offset = offset; this.expected = expected; this.newValue = newValue; this.directResult = directResult; } @Override public void generate(LIRGeneratorTool gen) { gen.visitCompareAndSwap(this); } // specialized on value type until boxing/unboxing is sorted out in intrinsification @SuppressWarnings("unused") @NodeIntrinsic public static boolean compareAndSwap(Object object, long offset, Object expected, Object newValue) { throw new UnsupportedOperationException(); } @SuppressWarnings("unused") @NodeIntrinsic public static boolean compareAndSwap(Object object, long offset, long expected, long newValue) { throw new UnsupportedOperationException(); } @SuppressWarnings("unused") @NodeIntrinsic public static boolean compareAndSwap(Object object, long offset, int expected, int newValue) { throw new UnsupportedOperationException(); } }