Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/CompilerDirectives.java @ 15222:58d2c5bdb9cd
Truffle: Add option TruffleReturnTypeSpeculation.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 18 Apr 2014 02:00:24 +0200 |
parents | f675818d9ad0 |
children | df724f63f776 |
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1 /* |
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2 * Copyright (c) 2013, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api; |
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26 |
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27 import java.lang.annotation.*; |
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28 import java.lang.reflect.*; |
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29 import java.util.concurrent.*; |
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30 |
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31 import sun.misc.*; |
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32 |
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33 import com.oracle.truffle.api.frame.*; |
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34 |
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35 /** |
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36 * Directives that influence the optimizations of the Truffle compiler. All of the operations have |
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37 * no effect when executed in the Truffle interpreter. |
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38 */ |
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39 public final class CompilerDirectives { |
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40 |
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41 public static final double LIKELY_PROBABILITY = 0.75; |
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42 public static final double UNLIKELY_PROBABILITY = 1.0 - LIKELY_PROBABILITY; |
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43 |
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44 public static final double SLOWPATH_PROBABILITY = 0.0001; |
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45 public static final double FASTPATH_PROBABILITY = 1.0 - SLOWPATH_PROBABILITY; |
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46 |
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47 private static final Unsafe UNSAFE = getUnsafe(); |
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48 |
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49 private static Unsafe getUnsafe() { |
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50 try { |
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51 return Unsafe.getUnsafe(); |
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52 } catch (SecurityException e) { |
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53 } |
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54 try { |
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55 Field theUnsafeInstance = Unsafe.class.getDeclaredField("theUnsafe"); |
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56 theUnsafeInstance.setAccessible(true); |
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57 return (Unsafe) theUnsafeInstance.get(Unsafe.class); |
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58 } catch (Exception e) { |
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59 throw new RuntimeException("exception while trying to get Unsafe.theUnsafe via reflection:", e); |
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60 } |
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61 } |
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62 |
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63 /** |
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64 * Directive for the compiler to discontinue compilation at this code position and instead |
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65 * insert a transfer to the interpreter. |
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66 */ |
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67 public static void transferToInterpreter() { |
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68 } |
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69 |
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70 /** |
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71 * Directive for the compiler to discontinue compilation at this code position and instead |
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72 * insert a transfer to the interpreter, invalidating the currently executing machine code. |
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73 */ |
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74 public static void transferToInterpreterAndInvalidate() { |
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75 } |
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76 |
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77 /** |
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78 * Returns a boolean value indicating whether the method is executed in the interpreter. |
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79 * |
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80 * @return {@code true} when executed in the interpreter, {@code false} in compiled code. |
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81 */ |
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82 public static boolean inInterpreter() { |
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83 return true; |
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84 } |
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85 |
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86 /** |
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87 * Directive for the compiler that the given runnable should only be executed in the interpreter |
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88 * and ignored in the compiled code. |
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89 * |
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90 * @param runnable the closure that should only be executed in the interpreter |
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91 */ |
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92 public static void interpreterOnly(Runnable runnable) { |
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93 runnable.run(); |
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94 } |
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95 |
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96 /** |
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97 * Directive for the compiler that the given callable should only be executed in the |
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98 * interpreter. |
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99 * |
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100 * @param callable the closure that should only be executed in the interpreter |
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101 * @return the result of executing the closure in the interpreter and null in the compiled code |
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102 * @throws Exception If the closure throws an exception when executed in the interpreter. |
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103 */ |
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104 public static <T> T interpreterOnly(Callable<T> callable) throws Exception { |
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105 return callable.call(); |
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106 } |
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107 |
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108 /** |
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109 * Injects a probability for the given condition into the probability information of the |
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110 * immediately succeeding branch instruction for the condition. The probability must be a value |
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111 * between 0.0 and 1.0 (inclusive). The condition should not be a combined condition. |
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112 * |
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113 * Example usage immediately before an if statement (it specifies that the likelihood for a to |
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114 * be greater than b is 90%): |
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115 * |
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116 * <code> |
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118 * // ... |
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119 * } |
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120 * </code> |
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121 * |
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122 * Example usage for a combined condition (it specifies that the likelihood for a to be greater |
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123 * than b is 90% and under the assumption that this is true, the likelihood for a being 0 is |
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124 * 10%): |
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125 * |
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126 * <code> |
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128 * // ... |
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129 * } |
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130 * </code> |
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131 * |
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132 * There are predefined constants for commonly used probabilities (see |
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133 * {@link #LIKELY_PROBABILITY} , {@link #UNLIKELY_PROBABILITY}, {@link #SLOWPATH_PROBABILITY}, |
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134 * {@link #FASTPATH_PROBABILITY} ). |
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135 * |
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136 * @param probability the probability value between 0.0 and 1.0 that should be injected |
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137 */ |
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138 public static boolean injectBranchProbability(double probability, boolean condition) { |
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139 assert probability >= 0.0 && probability <= 1.0; |
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140 return condition; |
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141 } |
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142 |
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143 /** |
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144 * Bails out of a compilation (e.g., for guest language features that should never be compiled). |
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145 * |
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146 * @param reason the reason for the bailout |
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147 */ |
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148 public static void bailout(String reason) { |
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149 } |
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150 |
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151 /** |
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152 * Marks fields that should be considered final for a Truffle compilation although they are not |
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153 * final while executing in the interpreter. |
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154 */ |
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155 @Retention(RetentionPolicy.RUNTIME) |
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156 @Target({ElementType.FIELD}) |
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157 public @interface CompilationFinal { |
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158 } |
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159 |
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160 /** |
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161 * Casts the given value to the value of the given type without any checks. The class must |
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162 * evaluate to a constant. The condition parameter gives a hint to the compiler under which |
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163 * circumstances this cast can be moved to an earlier location in the program. |
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164 * |
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165 * @param value the value that is known to have the specified type |
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166 * @param type the specified new type of the value |
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167 * @param condition the condition that makes this cast safe also at an earlier location of the |
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168 * program |
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169 * @return the value to be casted to the new type |
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170 */ |
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171 public static <T> T unsafeCast(Object value, Class<T> type, boolean condition) { |
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172 return unsafeCast(value, type, condition, false); |
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173 } |
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174 |
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175 /** |
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176 * Casts the given value to the value of the given type without any checks. The class must |
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177 * evaluate to a constant. The condition parameter gives a hint to the compiler under which |
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178 * circumstances this cast can be moved to an earlier location in the program. |
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179 * |
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180 * @param value the value that is known to have the specified type |
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181 * @param type the specified new type of the value |
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182 * @param condition the condition that makes this cast safe also at an earlier location of the |
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183 * program |
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184 * @param nonNull whether value is known to never be null |
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185 * @return the value to be casted to the new type |
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186 */ |
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187 @SuppressWarnings("unchecked") |
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188 public static <T> T unsafeCast(Object value, Class<T> type, boolean condition, boolean nonNull) { |
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189 return (T) value; |
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190 } |
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191 |
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192 /** |
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193 * Asserts that this value is not null and retrieved from a call to Frame.materialize. |
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194 * |
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195 * @param value the value that is known to have been obtained via Frame.materialize |
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196 * @return the value to be casted to the new type |
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197 */ |
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198 public static MaterializedFrame unsafeFrameCast(MaterializedFrame value) { |
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199 return unsafeCast(value, getUnsafeFrameType(), true, true); |
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200 } |
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201 |
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202 private static Class<? extends MaterializedFrame> getUnsafeFrameType() { |
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203 return MaterializedFrame.class; |
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204 } |
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205 |
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206 /** |
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207 * Unsafe access to a boolean value within an object. The condition parameter gives a hint to |
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208 * the compiler under which circumstances this access can be moved to an earlier location in the |
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209 * program. The location identity gives a hint to the compiler for improved global value |
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210 * numbering. |
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211 * |
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212 * @param receiver the object that is accessed |
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213 * @param offset the offset at which to access the object in bytes |
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214 * @param condition the condition that makes this access safe also at an earlier location in the |
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215 * program |
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216 * @param locationIdentity the location identity token that can be used for improved global |
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217 * value numbering or null |
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218 * @return the accessed value |
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219 */ |
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220 public static boolean unsafeGetBoolean(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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221 return UNSAFE.getBoolean(receiver, offset); |
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222 } |
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223 |
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224 /** |
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225 * Unsafe access to a byte value within an object. The condition parameter gives a hint to the |
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226 * compiler under which circumstances this access can be moved to an earlier location in the |
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227 * program. The location identity gives a hint to the compiler for improved global value |
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228 * numbering. |
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229 * |
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230 * @param receiver the object that is accessed |
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231 * @param offset the offset at which to access the object in bytes |
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232 * @param condition the condition that makes this access safe also at an earlier location in the |
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233 * program |
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234 * @param locationIdentity the location identity token that can be used for improved global |
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235 * value numbering or null |
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236 * @return the accessed value |
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237 */ |
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238 public static byte unsafeGetByte(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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239 return UNSAFE.getByte(receiver, offset); |
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240 } |
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241 |
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242 /** |
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243 * Unsafe access to a short value within an object. The condition parameter gives a hint to the |
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244 * compiler under which circumstances this access can be moved to an earlier location in the |
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245 * program. The location identity gives a hint to the compiler for improved global value |
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246 * numbering. |
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247 * |
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248 * @param receiver the object that is accessed |
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249 * @param offset the offset at which to access the object in bytes |
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250 * @param condition the condition that makes this access safe also at an earlier location in the |
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251 * program |
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252 * @param locationIdentity the location identity token that can be used for improved global |
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253 * value numbering or null |
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254 * @return the accessed value |
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255 */ |
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256 public static short unsafeGetShort(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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257 return UNSAFE.getShort(receiver, offset); |
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258 } |
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259 |
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260 /** |
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261 * Unsafe access to an int value within an object. The condition parameter gives a hint to the |
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262 * compiler under which circumstances this access can be moved to an earlier location in the |
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263 * program. The location identity gives a hint to the compiler for improved global value |
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264 * numbering. |
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265 * |
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266 * @param receiver the object that is accessed |
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267 * @param offset the offset at which to access the object in bytes |
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268 * @param condition the condition that makes this access safe also at an earlier location in the |
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269 * program |
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270 * @param locationIdentity the location identity token that can be used for improved global |
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271 * value numbering or null |
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272 * @return the accessed value |
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273 */ |
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274 public static int unsafeGetInt(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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275 return UNSAFE.getInt(receiver, offset); |
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276 } |
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277 |
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278 /** |
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279 * Unsafe access to a long value within an object. The condition parameter gives a hint to the |
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280 * compiler under which circumstances this access can be moved to an earlier location in the |
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281 * program. The location identity gives a hint to the compiler for improved global value |
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282 * numbering. |
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283 * |
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284 * @param receiver the object that is accessed |
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285 * @param offset the offset at which to access the object in bytes |
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286 * @param condition the condition that makes this access safe also at an earlier location in the |
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287 * program |
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288 * @param locationIdentity the location identity token that can be used for improved global |
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289 * value numbering or null |
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290 * @return the accessed value |
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291 */ |
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292 public static long unsafeGetLong(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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293 return UNSAFE.getLong(receiver, offset); |
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294 } |
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295 |
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296 /** |
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297 * Unsafe access to a float value within an object. The condition parameter gives a hint to the |
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298 * compiler under which circumstances this access can be moved to an earlier location in the |
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299 * program. The location identity gives a hint to the compiler for improved global value |
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300 * numbering. |
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301 * |
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302 * @param receiver the object that is accessed |
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303 * @param offset the offset at which to access the object in bytes |
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304 * @param condition the condition that makes this access safe also at an earlier location in the |
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305 * program |
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306 * @param locationIdentity the location identity token that can be used for improved global |
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307 * value numbering or null |
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308 * @return the accessed value |
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309 */ |
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310 public static float unsafeGetFloat(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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311 return UNSAFE.getFloat(receiver, offset); |
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312 } |
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313 |
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314 /** |
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315 * Unsafe access to a double value within an object. The condition parameter gives a hint to the |
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316 * compiler under which circumstances this access can be moved to an earlier location in the |
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317 * program. The location identity gives a hint to the compiler for improved global value |
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318 * numbering. |
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319 * |
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320 * @param receiver the object that is accessed |
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321 * @param offset the offset at which to access the object in bytes |
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322 * @param condition the condition that makes this access safe also at an earlier location in the |
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323 * program |
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324 * @param locationIdentity the location identity token that can be used for improved global |
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325 * value numbering or null |
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326 * @return the accessed value |
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327 */ |
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328 public static double unsafeGetDouble(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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329 return UNSAFE.getDouble(receiver, offset); |
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330 } |
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331 |
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332 /** |
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333 * Unsafe access to an Object value within an object. The condition parameter gives a hint to |
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334 * the compiler under which circumstances this access can be moved to an earlier location in the |
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335 * program. The location identity gives a hint to the compiler for improved global value |
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336 * numbering. |
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337 * |
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338 * @param receiver the object that is accessed |
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339 * @param offset the offset at which to access the object in bytes |
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340 * @param condition the condition that makes this access safe also at an earlier location in the |
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341 * program |
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342 * @param locationIdentity the location identity token that can be used for improved global |
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343 * value numbering or null |
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344 * @return the accessed value |
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345 */ |
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346 public static Object unsafeGetObject(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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347 return UNSAFE.getObject(receiver, offset); |
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348 } |
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349 |
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350 /** |
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351 * Write a boolean value within an object. The location identity gives a hint to the compiler |
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352 * for improved global value numbering. |
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353 * |
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354 * @param receiver the object that is written to |
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355 * @param offset the offset at which to write to the object in bytes |
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356 * @param value the value to be written |
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357 * @param locationIdentity the location identity token that can be used for improved global |
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358 * value numbering or null |
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359 */ |
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360 public static void unsafePutBoolean(Object receiver, long offset, boolean value, Object locationIdentity) { |
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361 UNSAFE.putBoolean(receiver, offset, value); |
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362 } |
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363 |
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364 /** |
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365 * Write a byte value within an object. The location identity gives a hint to the compiler for |
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366 * improved global value numbering. |
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367 * |
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368 * @param receiver the object that is written to |
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369 * @param offset the offset at which to write to the object in bytes |
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370 * @param value the value to be written |
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371 * @param locationIdentity the location identity token that can be used for improved global |
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372 * value numbering or null |
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373 */ |
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374 public static void unsafePutByte(Object receiver, long offset, byte value, Object locationIdentity) { |
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375 UNSAFE.putByte(receiver, offset, value); |
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376 } |
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377 |
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378 /** |
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379 * Write a short value within an object. The location identity gives a hint to the compiler for |
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380 * improved global value numbering. |
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381 * |
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382 * @param receiver the object that is written to |
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383 * @param offset the offset at which to write to the object in bytes |
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384 * @param value the value to be written |
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385 * @param locationIdentity the location identity token that can be used for improved global |
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386 * value numbering or null |
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387 */ |
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388 public static void unsafePutShort(Object receiver, long offset, short value, Object locationIdentity) { |
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389 UNSAFE.putShort(receiver, offset, value); |
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390 } |
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391 |
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392 /** |
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393 * Write an int value within an object. The location identity gives a hint to the compiler for |
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394 * improved global value numbering. |
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395 * |
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396 * @param receiver the object that is written to |
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397 * @param offset the offset at which to write to the object in bytes |
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398 * @param value the value to be written |
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399 * @param locationIdentity the location identity token that can be used for improved global |
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400 * value numbering or null |
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401 */ |
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402 public static void unsafePutInt(Object receiver, long offset, int value, Object locationIdentity) { |
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403 UNSAFE.putInt(receiver, offset, value); |
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404 } |
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405 |
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406 /** |
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407 * Write a long value within an object. The location identity gives a hint to the compiler for |
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408 * improved global value numbering. |
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409 * |
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410 * @param receiver the object that is written to |
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411 * @param offset the offset at which to write to the object in bytes |
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412 * @param value the value to be written |
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413 * @param locationIdentity the location identity token that can be used for improved global |
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414 * value numbering or null |
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415 */ |
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416 public static void unsafePutLong(Object receiver, long offset, long value, Object locationIdentity) { |
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417 UNSAFE.putLong(receiver, offset, value); |
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418 } |
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419 |
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420 /** |
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421 * Write a float value within an object. The location identity gives a hint to the compiler for |
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422 * improved global value numbering. |
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423 * |
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424 * @param receiver the object that is written to |
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425 * @param offset the offset at which to write to the object in bytes |
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426 * @param value the value to be written |
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427 * @param locationIdentity the location identity token that can be used for improved global |
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428 * value numbering or null |
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429 */ |
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430 public static void unsafePutFloat(Object receiver, long offset, float value, Object locationIdentity) { |
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431 UNSAFE.putFloat(receiver, offset, value); |
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432 } |
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433 |
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434 /** |
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435 * Write a double value within an object. The location identity gives a hint to the compiler for |
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436 * improved global value numbering. |
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437 * |
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438 * @param receiver the object that is written to |
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439 * @param offset the offset at which to write to the object in bytes |
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440 * @param value the value to be written |
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441 * @param locationIdentity the location identity token that can be used for improved global |
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442 * value numbering or null |
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443 */ |
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444 public static void unsafePutDouble(Object receiver, long offset, double value, Object locationIdentity) { |
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445 UNSAFE.putDouble(receiver, offset, value); |
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446 } |
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447 |
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448 /** |
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449 * Write an Object value within an object. The location identity gives a hint to the compiler |
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450 * for improved global value numbering. |
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451 * |
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452 * @param receiver the object that is written to |
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453 * @param offset the offset at which to write to the object in bytes |
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454 * @param value the value to be written |
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455 * @param locationIdentity the location identity token that can be used for improved global |
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456 * value numbering or null |
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457 */ |
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458 public static void unsafePutObject(Object receiver, long offset, Object value, Object locationIdentity) { |
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459 UNSAFE.putObject(receiver, offset, value); |
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460 } |
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461 |
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462 /** |
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463 * Unsafe access to a final boolean value within an object. The condition parameter gives a hint |
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464 * to the compiler under which circumstances this access can be moved to an earlier location in |
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465 * the program. The location identity gives a hint to the compiler for improved global value |
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466 * numbering. |
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467 * |
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468 * @param receiver the object that is accessed |
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469 * @param offset the offset at which to access the object in bytes |
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470 * @param condition the condition that makes this access safe also at an earlier location in the |
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471 * program |
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472 * @param locationIdentity the location identity token that can be used for improved global |
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473 * value numbering or null |
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474 * @return the accessed value |
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475 */ |
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476 public static boolean unsafeGetFinalBoolean(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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477 return UNSAFE.getBoolean(receiver, offset); |
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478 } |
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479 |
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480 /** |
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481 * Unsafe access to a final byte value within an object. The condition parameter gives a hint to |
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482 * the compiler under which circumstances this access can be moved to an earlier location in the |
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483 * program. The location identity gives a hint to the compiler for improved global value |
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484 * numbering. |
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485 * |
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486 * @param receiver the object that is accessed |
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487 * @param offset the offset at which to access the object in bytes |
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488 * @param condition the condition that makes this access safe also at an earlier location in the |
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489 * program |
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490 * @param locationIdentity the location identity token that can be used for improved global |
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491 * value numbering or null |
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492 * @return the accessed value |
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493 */ |
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494 public static byte unsafeGetFinalByte(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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495 return UNSAFE.getByte(receiver, offset); |
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496 } |
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497 |
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498 /** |
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499 * Unsafe access to a final short value within an object. The condition parameter gives a hint |
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500 * to the compiler under which circumstances this access can be moved to an earlier location in |
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501 * the program. The location identity gives a hint to the compiler for improved global value |
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502 * numbering. |
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503 * |
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504 * @param receiver the object that is accessed |
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505 * @param offset the offset at which to access the object in bytes |
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506 * @param condition the condition that makes this access safe also at an earlier location in the |
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507 * program |
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508 * @param locationIdentity the location identity token that can be used for improved global |
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509 * value numbering or null |
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510 * @return the accessed value |
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511 */ |
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512 public static short unsafeGetFinalShort(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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513 return UNSAFE.getShort(receiver, offset); |
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514 } |
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515 |
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516 /** |
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517 * Unsafe access to a final int value within an object. The condition parameter gives a hint to |
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518 * the compiler under which circumstances this access can be moved to an earlier location in the |
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519 * program. The location identity gives a hint to the compiler for improved global value |
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520 * numbering. |
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521 * |
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522 * @param receiver the object that is accessed |
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523 * @param offset the offset at which to access the object in bytes |
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524 * @param condition the condition that makes this access safe also at an earlier location in the |
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525 * program |
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526 * @param locationIdentity the location identity token that can be used for improved global |
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527 * value numbering or null |
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528 * @return the accessed value |
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529 */ |
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530 public static int unsafeGetFinalInt(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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531 return UNSAFE.getInt(receiver, offset); |
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532 } |
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533 |
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534 /** |
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535 * Unsafe access to a final long value within an object. The condition parameter gives a hint to |
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536 * the compiler under which circumstances this access can be moved to an earlier location in the |
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537 * program. The location identity gives a hint to the compiler for improved global value |
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538 * numbering. |
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539 * |
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540 * @param receiver the object that is accessed |
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541 * @param offset the offset at which to access the object in bytes |
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542 * @param condition the condition that makes this access safe also at an earlier location in the |
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543 * program |
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544 * @param locationIdentity the location identity token that can be used for improved global |
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545 * value numbering or null |
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546 * @return the accessed value |
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547 */ |
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548 public static long unsafeGetFinalLong(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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549 return UNSAFE.getLong(receiver, offset); |
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550 } |
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551 |
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552 /** |
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553 * Unsafe access to a final float value within an object. The condition parameter gives a hint |
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554 * to the compiler under which circumstances this access can be moved to an earlier location in |
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555 * the program. The location identity gives a hint to the compiler for improved global value |
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556 * numbering. |
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557 * |
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558 * @param receiver the object that is accessed |
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559 * @param offset the offset at which to access the object in bytes |
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560 * @param condition the condition that makes this access safe also at an earlier location in the |
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561 * program |
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562 * @param locationIdentity the location identity token that can be used for improved global |
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563 * value numbering or null |
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564 * @return the accessed value |
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565 */ |
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566 public static float unsafeGetFinalFloat(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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567 return UNSAFE.getFloat(receiver, offset); |
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568 } |
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569 |
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570 /** |
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571 * Unsafe access to a final double value within an object. The condition parameter gives a hint |
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572 * to the compiler under which circumstances this access can be moved to an earlier location in |
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573 * the program. The location identity gives a hint to the compiler for improved global value |
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574 * numbering. |
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575 * |
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576 * @param receiver the object that is accessed |
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577 * @param offset the offset at which to access the object in bytes |
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578 * @param condition the condition that makes this access safe also at an earlier location in the |
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579 * program |
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580 * @param locationIdentity the location identity token that can be used for improved global |
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581 * value numbering or null |
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582 * @return the accessed value |
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583 */ |
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584 public static double unsafeGetFinalDouble(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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585 return UNSAFE.getDouble(receiver, offset); |
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586 } |
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587 |
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588 /** |
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589 * Unsafe access to a final Object value within an object. The condition parameter gives a hint |
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590 * to the compiler under which circumstances this access can be moved to an earlier location in |
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591 * the program. The location identity gives a hint to the compiler for improved global value |
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592 * numbering. |
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593 * |
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594 * @param receiver the object that is accessed |
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595 * @param offset the offset at which to access the object in bytes |
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596 * @param condition the condition that makes this access safe also at an earlier location in the |
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597 * program |
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598 * @param locationIdentity the location identity token that can be used for improved global |
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599 * value numbering or null |
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600 * @return the accessed value |
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601 */ |
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602 public static Object unsafeGetFinalObject(Object receiver, long offset, boolean condition, Object locationIdentity) { |
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603 return UNSAFE.getObject(receiver, offset); |
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604 } |
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605 |
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606 /** |
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607 * Marks methods that are considered slowpath and should therefore not be inlined by default. |
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608 */ |
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609 @Retention(RetentionPolicy.RUNTIME) |
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610 @Target({ElementType.METHOD}) |
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611 public @interface SlowPath { |
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612 } |
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613 |
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614 /** |
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615 * Marks classes as value types. Reference comparisons (==) between instances of those classes |
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616 * have undefined semantics and can either return true or false. |
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617 */ |
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618 @Retention(RetentionPolicy.RUNTIME) |
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619 @Target({ElementType.TYPE}) |
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620 public @interface ValueType { |
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621 } |
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622 |
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623 /** |
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624 * Ensures that the given object is not virtual, i.e., not removed by Escape Analysis at the |
f675818d9ad0
new getStackTrace and getCurrentFrame functionality in TruffleRuntime
Lukas Stadler <lukas.stadler@oracle.com>
parents:
14991
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625 * point of this call. |
f675818d9ad0
new getStackTrace and getCurrentFrame functionality in TruffleRuntime
Lukas Stadler <lukas.stadler@oracle.com>
parents:
14991
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626 * |
f675818d9ad0
new getStackTrace and getCurrentFrame functionality in TruffleRuntime
Lukas Stadler <lukas.stadler@oracle.com>
parents:
14991
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627 * @param obj the object to exclude from Escape Analysis |
f675818d9ad0
new getStackTrace and getCurrentFrame functionality in TruffleRuntime
Lukas Stadler <lukas.stadler@oracle.com>
parents:
14991
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628 */ |
f675818d9ad0
new getStackTrace and getCurrentFrame functionality in TruffleRuntime
Lukas Stadler <lukas.stadler@oracle.com>
parents:
14991
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629 public static void materialize(Object obj) { |
f675818d9ad0
new getStackTrace and getCurrentFrame functionality in TruffleRuntime
Lukas Stadler <lukas.stadler@oracle.com>
parents:
14991
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630 } |
9283
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Fix new line at end of file.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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631 } |