| /* |
| * Copyright (c) 2000, 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 sun.jvm.hotspot.compiler; |
| |
| import sun.jvm.hotspot.code.*; |
| |
| public class OopMapStream { |
| private CompressedReadStream stream; |
| private OopMap oopMap; |
| private int mask; |
| private int size; |
| private int position; |
| private OopMapValue omv; |
| private boolean omvValid; |
| |
| public OopMapStream(OopMap oopMap) { |
| this(oopMap, (OopMapValue.OopTypes[]) null); |
| } |
| |
| public OopMapStream(OopMap oopMap, OopMapValue.OopTypes type) { |
| this(oopMap, (OopMapValue.OopTypes[]) null); |
| mask = type.getValue(); |
| } |
| |
| public OopMapStream(OopMap oopMap, OopMapValue.OopTypes[] types) { |
| if (oopMap.getOMVData() == null) { |
| stream = new CompressedReadStream(oopMap.getWriteStream().getBuffer()); |
| } else { |
| stream = new CompressedReadStream(oopMap.getOMVData()); |
| } |
| mask = computeMask(types); |
| size = (int) oopMap.getOMVCount(); |
| position = 0; |
| omv = new OopMapValue(); |
| omvValid = false; |
| } |
| |
| public boolean isDone() { |
| if (!omvValid) { |
| findNext(); |
| } |
| return !omvValid; |
| } |
| |
| public void next() { |
| findNext(); |
| } |
| |
| public OopMapValue getCurrent() { |
| return omv; |
| } |
| |
| //-------------------------------------------------------------------------------- |
| // Internals only below this point |
| // |
| |
| private int computeMask(OopMapValue.OopTypes[] types) { |
| mask = 0; |
| if (types != null) { |
| for (int i = 0; i < types.length; i++) { |
| mask |= types[i].getValue(); |
| } |
| } |
| return mask; |
| } |
| |
| private void findNext() { |
| while (position++ < size) { |
| omv.readFrom(stream); |
| if ((omv.getType().getValue() & mask) > 0) { |
| omvValid = true; |
| return; |
| } |
| } |
| omvValid = false; |
| } |
| } |