Mercurial > hg > truffle

annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/Frame.java @ 7711:960a15fea39a

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Make materialized frame also being usable as a packed frame.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 05 Feb 2013 15:19:17 +0100
parents 5e3d1a68664e
children 1a2d258d481a
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1 /*
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2 * Copyright (c) 2012, 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.api.frame;
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24
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25 import com.oracle.truffle.api.*;
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26
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27 /**
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28 * Represents a frame containing values of local variables of the guest language. Instances of this
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29 * type must not be stored in a field or cast to {@link java.lang.Object}.
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30 */
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31 public interface Frame {
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32
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33 /**
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34 * @return the arguments used when calling this method
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35 */
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36 Arguments getArguments();
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37
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38 /**
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39 * Read access to a local variable of type {@link Object}.
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40 *
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41 * @param slot the slot of the local variable
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42 * @return the current value of the local variable
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43 */
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44 Object getObject(FrameSlot slot);
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45
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46 /**
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47 * Write access to a local variable of type {@link Object}.
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48 *
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49 * @param slot the slot of the local variable
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50 * @param value the new value of the local variable
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51 */
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52 void setObject(FrameSlot slot, Object value);
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53
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54 /**
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55 * Read access to a local variable of type boolean.
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56 *
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57 * @param slot the slot of the local variable
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58 * @return the current value of the local variable
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59 */
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60 boolean getBoolean(FrameSlot slot);
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61
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62 /**
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63 * Write access to a local variable of type boolean.
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64 *
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65 * @param slot the slot of the local variable
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66 * @param value the new value of the local variable
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67 */
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68 void setBoolean(FrameSlot slot, boolean value);
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70 /**
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71 * Read access to a local variable of type int.
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72 *
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73 * @param slot the slot of the local variable
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74 * @return the current value of the local variable
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75 */
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76 int getInt(FrameSlot slot);
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78 /**
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79 * Write access to a local variable of type int.
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80 *
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81 * @param slot the slot of the local variable
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82 * @param value the new value of the local variable
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83 */
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84 void setInt(FrameSlot slot, int value);
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85
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86 /**
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87 * Read access to a local variable of type long.
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88 *
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89 * @param slot the slot of the local variable
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90 * @return the current value of the local variable
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91 */
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92 long getLong(FrameSlot slot);
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93
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94 /**
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95 * Write access to a local variable of type long.
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96 *
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97 * @param slot the slot of the local variable
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98 * @param value the new value of the local variable
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99 */
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100 void setLong(FrameSlot slot, long value);
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101
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102 /**
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103 * Read access to a local variable of type float.
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104 *
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105 * @param slot the slot of the local variable
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106 * @return the current value of the local variable
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107 */
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108 float getFloat(FrameSlot slot);
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109
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110 /**
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111 * Write access to a local variable of type float.
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112 *
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113 * @param slot the slot of the local variable
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114 * @param value the new value of the local variable
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115 */
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116 void setFloat(FrameSlot slot, float value);
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117
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118 /**
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119 * Read access to a local variable of type double.
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120 *
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121 * @param slot the slot of the local variable
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122 * @return the current value of the local variable
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123 */
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124 double getDouble(FrameSlot slot);
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125
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126 /**
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127 * Write access to a local variable of type double.
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128 *
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129 * @param slot the slot of the local variable
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130 * @param value the new value of the local variable
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131 */
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132 void setDouble(FrameSlot slot, double value);
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133
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134 void updateToLatestVersion();
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135
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136 /**
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137 * Converts this virtual frame into a packed frame that has no longer direct access to the local
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138 * variables. This packing is an important hint to the Truffle optimizer and therefore passing
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139 * around a {@link PackedFrame} should be preferred over passing around a {@link VirtualFrame}
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140 * when the probability that an unpacking will occur is low.
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141 *
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142 * @return the packed frame
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143 */
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144 PackedFrame pack();
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145
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146 /**
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147 * Materializes this frame, which allows it to be stored in a field or cast to
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148 * {@link java.lang.Object}. The frame however looses the ability to be packed or to access the
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149 * caller frame.
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150 *
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151 * @return the new materialized frame
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152 */
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153 MaterializedFrame materialize();
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154 }