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annotate truffle/com.oracle.truffle.object/src/com/oracle/truffle/object/LayoutStrategy.java @ 22548:6b76a24fffbd default tip

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author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 14 Jan 2016 14:20:57 +0100
parents cf203af4610c
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1 /*
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2 * Copyright (c) 2014, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.object;
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24
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25 import com.oracle.truffle.api.object.DynamicObject;
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26 import com.oracle.truffle.api.object.Location;
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27 import com.oracle.truffle.api.object.Property;
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28 import com.oracle.truffle.api.object.Shape;
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29 import com.oracle.truffle.object.ShapeImpl.BaseAllocator;
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31 public abstract class LayoutStrategy {
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32 public abstract boolean updateShape(DynamicObject object);
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33
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34 public abstract ShapeImpl ensureValid(ShapeImpl newShape);
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35
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36 public abstract ShapeImpl ensureSpace(ShapeImpl shape, Location location);
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38 public abstract boolean isAutoExtArray();
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39
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40 public abstract BaseAllocator createAllocator(LayoutImpl shape);
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41
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42 public abstract BaseAllocator createAllocator(ShapeImpl shape);
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43
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44 protected abstract ShapeAndProperty generalizeProperty(Property oldProperty, Object value, ShapeImpl currentShape, ShapeImpl nextShape);
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45
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46 public static class ShapeAndProperty {
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47 private final Shape shape;
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48 private final Property property;
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49
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50 public ShapeAndProperty(Shape shape, Property property) {
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51 this.shape = shape;
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52 this.property = property;
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53 }
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55 public Shape getShape() {
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56 return shape;
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57 }
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58
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59 public Property getProperty() {
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60 return property;
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61 }
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62 }
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63 }