Mercurial > hg > truffle
annotate truffle/com.oracle.truffle.api.profiles/src/com/oracle/truffle/api/profiles/LongValueProfile.java @ 22504:d80a5ff56f51
Storing the profiling enabled information in a static field; checking it only once; shielding against missing method in the TruffleRuntime interface
| author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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| date | Thu, 17 Dec 2015 13:45:37 +0100 |
| parents | 828c67903db2 |
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| rev | line source |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
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1 /* |
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2 * Copyright (c) 2015, 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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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
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6 * under the terms of the GNU General Public License version 2 only, as |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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7 * published by the Free Software Foundation. Oracle designates this |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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8 * particular file as subject to the "Classpath" exception as provided |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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9 * by Oracle in the LICENSE file that accompanied this code. |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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10 * |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
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15 * accompanied this code). |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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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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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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20 * |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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22 * or visit www.oracle.com if you need additional information or have any |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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23 * questions. |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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24 */ |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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25 package com.oracle.truffle.api.profiles; |
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26 |
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Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
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27 import com.oracle.truffle.api.CompilerDirectives; |
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28 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal; |
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29 |
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30 /** |
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31 * <p> |
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32 * Specialized value profile to capture certain properties of <code>long</code> runtime values. |
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33 * Value profiles require a runtime check in their initialized state to verify their profiled |
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34 * assumption. Value profiles are limited to capture monomorphic profiles only. This means that if |
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35 * two or more values are profiled within a single profile then the profile has no effect. If the |
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36 * value assumption is invalidated in compiled code then it is invalidated. |
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37 * </p> |
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38 * |
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39 * <p> |
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40 * <b> Usage example: </b> |
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41 * |
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42 * <pre> |
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43 * class SampleNode extends Node { |
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44 * |
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45 * final LongValueProfile profile = LongValueProfile.createIdentityProfile(); |
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46 * |
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47 * long execute(long input) { |
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48 * long profiledValue = profile.profile(input); |
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49 * // compiler may know now more about profiledValue |
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50 * return profiledValue; |
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51 * } |
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52 * } |
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53 * </pre> |
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54 * <p> |
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55 * |
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56 * {@inheritDoc} |
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57 * |
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58 * @see #createIdentityProfile() |
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59 * @see ValueProfile |
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60 */ |
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61 public abstract class LongValueProfile extends Profile { |
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62 |
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63 LongValueProfile() { |
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64 } |
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65 |
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66 public abstract long profile(long value); |
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67 |
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68 /** |
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69 * Returns a value profile that profiles the exact value of an <code>long</code>. |
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70 * |
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71 * @see LongValueProfile |
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72 */ |
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73 public static LongValueProfile createIdentityProfile() { |
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74 if (Profile.isProfilingEnabled()) { |
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75 return Enabled.create(); |
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76 } else { |
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77 return Disabled.INSTANCE; |
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78 } |
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79 } |
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80 |
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81 static final class Enabled extends LongValueProfile { |
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82 |
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83 private static final byte UNINITIALIZED = 0; |
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84 private static final byte SPECIALIZED = 1; |
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85 private static final byte GENERIC = 2; |
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86 |
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87 @CompilationFinal private long cachedValue; |
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88 @CompilationFinal private byte state = 0; |
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89 |
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90 @Override |
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91 public long profile(long value) { |
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92 byte localState = this.state; |
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93 if (localState != GENERIC) { |
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94 if (localState == SPECIALIZED) { |
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95 long v = cachedValue; |
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96 if (v == value) { |
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97 return v; |
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98 } |
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99 } |
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100 CompilerDirectives.transferToInterpreterAndInvalidate(); |
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101 if (localState == UNINITIALIZED) { |
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102 this.cachedValue = value; |
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103 this.state = SPECIALIZED; |
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104 } else { |
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105 this.state = GENERIC; |
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106 } |
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107 } |
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108 return value; |
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109 } |
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110 |
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111 boolean isGeneric() { |
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112 return state == GENERIC; |
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113 } |
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114 |
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115 boolean isUninitialized() { |
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116 return state == UNINITIALIZED; |
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117 } |
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118 |
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119 long getCachedValue() { |
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120 return cachedValue; |
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121 } |
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122 |
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123 @Override |
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124 public String toString() { |
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125 return toString(LongValueProfile.class, state == UNINITIALIZED, state == GENERIC, // |
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126 String.format("value == (long)%s", cachedValue)); |
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127 } |
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128 |
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129 /* Needed for lazy class loading. */ |
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130 static LongValueProfile create() { |
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131 return new Enabled(); |
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132 } |
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133 } |
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134 |
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135 static final class Disabled extends LongValueProfile { |
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136 |
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137 static final LongValueProfile INSTANCE = new Disabled(); |
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138 |
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139 @Override |
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140 protected Object clone() { |
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141 return INSTANCE; |
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142 } |
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143 |
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144 @Override |
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145 public long profile(long value) { |
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146 return value; |
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147 } |
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148 |
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149 @Override |
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150 public String toString() { |
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151 return toStringDisabled(LongValueProfile.class); |
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152 } |
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153 |
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154 } |
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155 } |