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13514
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1 /*
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2 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
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3 * code is released under a tri EPL/GPL/LGPL license. You can use it,
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4 * redistribute it and/or modify it under the terms of the:
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5 *
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6 * Eclipse Public License version 1.0
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7 * GNU General Public License version 2
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8 * GNU Lesser General Public License version 2.1
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9 */
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10 package com.oracle.truffle.ruby.runtime.objects;
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11
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12 import com.oracle.truffle.ruby.runtime.*;
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13
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14 /**
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15 * A storage location for any object.
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16 */
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17 public class ObjectStorageLocation extends StorageLocation {
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18
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19 private final int index;
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20
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21 public ObjectStorageLocation(ObjectLayout objectLayout, int index) {
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22 super(objectLayout);
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23 this.index = index;
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24 }
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25
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26 @Override
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27 public boolean isSet(RubyBasicObject object) {
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28 return object.objectStorageLocations[index] != null;
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29 }
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30
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31 @Override
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32 public Object read(RubyBasicObject object, boolean condition) {
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33 final Object result = object.objectStorageLocations[index];
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34
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35 if (result == null) {
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36 return NilPlaceholder.INSTANCE;
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37 } else {
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38 return result;
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39 }
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40 }
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41
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42 @Override
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43 public void write(RubyBasicObject object, Object value) {
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44 object.objectStorageLocations[index] = value;
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45 }
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46
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47 @Override
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48 public Class getStoredClass() {
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49 return Object.class;
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50 }
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51
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52 }
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