Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/ir/AccessMonitor.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/ir/AccessMonitor.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,87 @@ +/* + * Copyright (c) 2009, 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.sun.c1x.ir; + +import com.sun.c1x.value.*; +import com.sun.cri.ci.*; + +/** + * The {@code AccessMonitor} instruction is the base class of both monitor acquisition and release. + * + * @author Ben L. Titzer + */ +public abstract class AccessMonitor extends StateSplit { + + /** + * The object locked or unlocked by this instruction. + */ + private Value object; + + /** + * The address of the on-stack lock object or {@code null} if the runtime does not place locks on the stack. + */ + private Value lockAddress; + + /** + * The lock number of this monitor access. + */ + public final int lockNumber; + + + /** + * Creates a new AccessMonitor instruction. + * + * @param object the instruction producing the object + * @param lockAddress the address of the on-stack lock object or {@code null} if the runtime does not place locks on the stack + * @param stateBefore the state before executing the monitor operation + * @param lockNumber the number of the lock being acquired + */ + public AccessMonitor(Value object, Value lockAddress, FrameState stateBefore, int lockNumber) { + super(CiKind.Illegal, stateBefore); + this.object = object; + this.lockAddress = lockAddress; + this.lockNumber = lockNumber; + } + + /** + * Gets the instruction producing the object locked or unlocked by this instruction. + */ + public Value object() { + return object; + } + + /** + * Gets the instruction producing the address of the lock object. + */ + public Value lockAddress() { + return lockAddress; + } + + @Override + public void inputValuesDo(ValueClosure closure) { + object = closure.apply(object); + if (lockAddress != null) { + lockAddress = closure.apply(lockAddress); + } + } +}