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comparison truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultVirtualFrame.java @ 21951:9c8c0937da41

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Moving all sources into truffle subdirectory
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 17 Jun 2015 10:58:08 +0200
parents graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultVirtualFrame.java@cef214c6d74a
children dc83cc1f94f2
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21950:2a5011c7e641 21951:9c8c0937da41
1 /*
2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package com.oracle.truffle.api.impl;
26
27 import java.util.*;
28
29 import com.oracle.truffle.api.*;
30 import com.oracle.truffle.api.frame.*;
31
32 /**
33 * This is an implementation-specific class. Do not use or instantiate it. Instead, use
34 * {@link TruffleRuntime#createVirtualFrame(Object[], FrameDescriptor)} to create a
35 * {@link VirtualFrame}.
36 */
37 final class DefaultVirtualFrame implements VirtualFrame {
38
39 private final FrameDescriptor descriptor;
40 private final Object[] arguments;
41 private Object[] locals;
42 private byte[] tags;
43
44 DefaultVirtualFrame(FrameDescriptor descriptor, Object[] arguments) {
45 this.descriptor = descriptor;
46 this.arguments = arguments;
47 this.locals = new Object[descriptor.getSize()];
48 Arrays.fill(locals, descriptor.getDefaultValue());
49 this.tags = new byte[descriptor.getSize()];
50 }
51
52 @Override
53 public Object[] getArguments() {
54 return arguments;
55 }
56
57 @Override
58 public MaterializedFrame materialize() {
59 return new DefaultMaterializedFrame(this);
60 }
61
62 @Override
63 public Object getObject(FrameSlot slot) throws FrameSlotTypeException {
64 verifyGet(slot, FrameSlotKind.Object);
65 return locals[slot.getIndex()];
66 }
67
68 @Override
69 public void setObject(FrameSlot slot, Object value) {
70 verifySet(slot, FrameSlotKind.Object);
71 locals[slot.getIndex()] = value;
72 }
73
74 @Override
75 public byte getByte(FrameSlot slot) throws FrameSlotTypeException {
76 verifyGet(slot, FrameSlotKind.Byte);
77 return (byte) locals[slot.getIndex()];
78 }
79
80 @Override
81 public void setByte(FrameSlot slot, byte value) {
82 verifySet(slot, FrameSlotKind.Byte);
83 locals[slot.getIndex()] = value;
84 }
85
86 @Override
87 public boolean getBoolean(FrameSlot slot) throws FrameSlotTypeException {
88 verifyGet(slot, FrameSlotKind.Boolean);
89 return (boolean) locals[slot.getIndex()];
90 }
91
92 @Override
93 public void setBoolean(FrameSlot slot, boolean value) {
94 verifySet(slot, FrameSlotKind.Boolean);
95 locals[slot.getIndex()] = value;
96 }
97
98 @Override
99 public int getInt(FrameSlot slot) throws FrameSlotTypeException {
100 verifyGet(slot, FrameSlotKind.Int);
101 return (int) locals[slot.getIndex()];
102 }
103
104 @Override
105 public void setInt(FrameSlot slot, int value) {
106 verifySet(slot, FrameSlotKind.Int);
107 locals[slot.getIndex()] = value;
108 }
109
110 @Override
111 public long getLong(FrameSlot slot) throws FrameSlotTypeException {
112 verifyGet(slot, FrameSlotKind.Long);
113 return (long) locals[slot.getIndex()];
114 }
115
116 @Override
117 public void setLong(FrameSlot slot, long value) {
118 verifySet(slot, FrameSlotKind.Long);
119 locals[slot.getIndex()] = value;
120 }
121
122 @Override
123 public float getFloat(FrameSlot slot) throws FrameSlotTypeException {
124 verifyGet(slot, FrameSlotKind.Float);
125 return (float) locals[slot.getIndex()];
126 }
127
128 @Override
129 public void setFloat(FrameSlot slot, float value) {
130 verifySet(slot, FrameSlotKind.Float);
131 locals[slot.getIndex()] = value;
132 }
133
134 @Override
135 public double getDouble(FrameSlot slot) throws FrameSlotTypeException {
136 verifyGet(slot, FrameSlotKind.Double);
137 return (double) locals[slot.getIndex()];
138 }
139
140 @Override
141 public void setDouble(FrameSlot slot, double value) {
142 verifySet(slot, FrameSlotKind.Double);
143 locals[slot.getIndex()] = value;
144 }
145
146 @Override
147 public FrameDescriptor getFrameDescriptor() {
148 return this.descriptor;
149 }
150
151 @Override
152 public Object getValue(FrameSlot slot) {
153 int slotIndex = getSlotIndexChecked(slot);
154 return locals[slotIndex];
155 }
156
157 private int getSlotIndexChecked(FrameSlot slot) {
158 int slotIndex = slot.getIndex();
159 if (slotIndex >= tags.length) {
160 if (!resize()) {
161 throw new IllegalArgumentException(String.format("The frame slot '%s' is not known by the frame descriptor.", slot));
162 }
163 }
164 return slotIndex;
165 }
166
167 private void verifySet(FrameSlot slot, FrameSlotKind accessKind) {
168 int slotIndex = getSlotIndexChecked(slot);
169 tags[slotIndex] = (byte) accessKind.ordinal();
170 }
171
172 private void verifyGet(FrameSlot slot, FrameSlotKind accessKind) throws FrameSlotTypeException {
173 int slotIndex = getSlotIndexChecked(slot);
174 byte tag = tags[slotIndex];
175 if (accessKind == FrameSlotKind.Object ? tag != 0 : tag != accessKind.ordinal()) {
176 throw new FrameSlotTypeException();
177 }
178 }
179
180 private boolean resize() {
181 int oldSize = tags.length;
182 int newSize = descriptor.getSize();
183 if (newSize > oldSize) {
184 locals = Arrays.copyOf(locals, newSize);
185 Arrays.fill(locals, oldSize, newSize, descriptor.getDefaultValue());
186 tags = Arrays.copyOf(tags, newSize);
187 return true;
188 }
189 return false;
190 }
191
192 private byte getTag(FrameSlot slot) {
193 int slotIndex = getSlotIndexChecked(slot);
194 return tags[slotIndex];
195 }
196
197 @Override
198 public boolean isObject(FrameSlot slot) {
199 return getTag(slot) == FrameSlotKind.Object.ordinal();
200 }
201
202 @Override
203 public boolean isByte(FrameSlot slot) {
204 return getTag(slot) == FrameSlotKind.Byte.ordinal();
205 }
206
207 @Override
208 public boolean isBoolean(FrameSlot slot) {
209 return getTag(slot) == FrameSlotKind.Boolean.ordinal();
210 }
211
212 @Override
213 public boolean isInt(FrameSlot slot) {
214 return getTag(slot) == FrameSlotKind.Int.ordinal();
215 }
216
217 @Override
218 public boolean isLong(FrameSlot slot) {
219 return getTag(slot) == FrameSlotKind.Long.ordinal();
220 }
221
222 @Override
223 public boolean isFloat(FrameSlot slot) {
224 return getTag(slot) == FrameSlotKind.Float.ordinal();
225 }
226
227 @Override
228 public boolean isDouble(FrameSlot slot) {
229 return getTag(slot) == FrameSlotKind.Double.ordinal();
230 }
231 }