Mercurial > hg > graal-compiler
changeset 21421:17bbd7cd6e29
Add CachedGraph utility class.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Tue, 19 May 2015 14:00:11 +0200 |
parents | fb17e716b03c |
children | 178a4927b95c fdf9166e575f |
files | graal/com.oracle.graal.graph/src/com/oracle/graal/graph/CachedGraph.java |
diffstat | 1 files changed, 48 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.graph/src/com/oracle/graal/graph/CachedGraph.java Tue May 19 14:00:11 2015 +0200 @@ -0,0 +1,48 @@ +/* + * Copyright (c) 2015, 2015, 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.graph; + +/** + * This class is a container of a graph that needs to be readonly and optionally a lazily created + * mutable copy of the graph. + */ +public class CachedGraph { + + private final Graph readonlyCopy; + private Graph mutableCopy; + + public CachedGraph(Graph readonlyCopy) { + this.readonlyCopy = readonlyCopy; + } + + public Graph getReadonlyCopy() { + return readonlyCopy; + } + + public Graph getMutableCopy() { + if (mutableCopy == null) { + mutableCopy = readonlyCopy.copy(); + } + return mutableCopy; + } +}