Mercurial > hg > truffle
annotate graal/com.oracle.max.base/src/com/sun/max/collect/PoolSet128.java @ 4240:394424b7df1a
Disabled certain DaCapo tests for fastdebug testing in the gate.
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 06 Jan 2012 18:35:39 +0100 |
parents | bc8527f3071c |
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rev | line source |
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1 /* |
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2 * Copyright (c) 2007, 2011, 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.sun.max.collect; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.sun.max.lang.*; |
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28 |
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29 /** |
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30 * A compact and efficient implementation of a {@link PoolSet} for pools with 128 objects or less. |
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31 * |
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32 * While it's possible to create an instance of this class directly, the preferred way to create a pool set is described |
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33 * {@linkplain PoolSet here}. |
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34 */ |
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35 public class PoolSet128<T extends PoolObject> extends PoolSet<T> { |
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36 |
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37 public static final int MAX_POOL_SIZE = 128; |
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38 |
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39 /** |
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40 * Bit vector representation of the low part of this set. The 2^k bit indicates the presence of _pool.get(k) in this set. |
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41 */ |
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42 private long setLow; |
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43 |
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44 /** |
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45 * Bit vector representation of the low part of this set. The 2^k bit indicates the presence of _pool.get(k + 64) in this set. |
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46 */ |
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47 private long setHigh; |
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48 |
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49 /** |
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50 * Creates an empty pool set for a pool with 128 objects or less. |
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51 */ |
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52 public PoolSet128(Pool<T> pool) { |
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53 super(pool); |
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54 assert pool.length() <= MAX_POOL_SIZE : pool.length() + " > " + MAX_POOL_SIZE; |
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55 } |
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56 |
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57 @Override |
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58 public int size() { |
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59 return Long.bitCount(setLow) + Long.bitCount(setHigh); |
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60 } |
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61 |
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62 @Override |
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63 public void clear() { |
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64 setLow = 0L; |
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65 setHigh = 0L; |
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66 } |
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67 |
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68 @Override |
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69 public boolean isEmpty() { |
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70 return setLow == 0L && setHigh == 0L; |
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71 } |
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72 |
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73 private static int bitToSerial(long bit) { |
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74 assert bit != 0 && Longs.isPowerOfTwoOrZero(bit); |
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75 return Long.numberOfTrailingZeros(bit); |
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76 } |
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77 |
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78 private static long serialToBit(int serial) { |
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79 assert serial >= 0 && serial < MAX_POOL_SIZE; |
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80 return 1L << serial; |
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81 } |
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82 |
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83 @Override |
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84 public boolean contains(T value) { |
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85 if (value == null) { |
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86 return false; |
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87 } |
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88 |
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89 final int serial = value.serial(); |
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90 assert pool.get(serial) == value; |
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91 if (serial < 64) { |
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92 return (serialToBit(serial) & setLow) != 0; |
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93 } |
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94 return (serialToBit(serial - 64) & setHigh) != 0; |
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95 } |
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96 |
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97 @Override |
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98 public void add(T value) { |
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99 final int serial = value.serial(); |
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100 assert pool.get(serial) == value; |
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101 if (serial < 64) { |
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102 setLow |= serialToBit(serial); |
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103 } else { |
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104 setHigh |= serialToBit(serial - 64); |
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105 } |
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106 } |
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107 |
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108 @Override |
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109 public PoolSet128<T> addAll() { |
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110 final int poolLength = pool.length(); |
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111 if (poolLength == 0) { |
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112 return this; |
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113 } |
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114 if (poolLength <= 64) { |
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115 final long highestBit = 1L << poolLength - 1; |
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116 setLow = highestBit | (highestBit - 1); |
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117 } else { |
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118 final long highestBit = 1L << (poolLength - 64) - 1; |
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119 setHigh = highestBit | (highestBit - 1); |
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120 setLow = -1L; |
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121 } |
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122 assert size() == poolLength; |
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123 return this; |
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124 } |
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125 |
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126 @Override |
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127 public void or(PoolSet<T> others) { |
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128 if (others instanceof PoolSet128) { |
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129 final PoolSet128 poolSet128 = (PoolSet128) others; |
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130 setLow |= poolSet128.setLow; |
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131 setHigh |= poolSet128.setHigh; |
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132 } else { |
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133 if (!others.isEmpty()) { |
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134 for (T element : others) { |
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135 add(element); |
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136 } |
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137 } |
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138 } |
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139 } |
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140 |
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141 @Override |
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142 public boolean remove(T value) { |
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143 if (!isEmpty()) { |
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144 final int serial = value.serial(); |
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145 assert pool.get(serial) == value; |
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146 final boolean present; |
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147 if (serial < 64) { |
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148 final long bit = serialToBit(serial); |
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149 present = (bit & setLow) != 0; |
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150 setLow &= ~bit; |
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151 } else { |
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152 final long bit = serialToBit(serial - 64); |
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153 present = (bit & setHigh) != 0; |
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154 setHigh &= ~bit; |
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155 } |
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156 return present; |
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157 } |
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158 return false; |
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159 } |
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160 |
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161 @Override |
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162 public T removeOne() { |
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163 if (isEmpty()) { |
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164 throw new NoSuchElementException(); |
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165 } |
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166 long bit = Long.lowestOneBit(setLow); |
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167 if (bit != 0) { |
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168 setLow &= ~bit; |
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169 return pool.get(bitToSerial(bit)); |
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170 } |
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171 bit = Long.lowestOneBit(setHigh); |
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172 assert bit != 0; |
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173 setHigh &= ~bit; |
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174 return pool.get(bitToSerial(bit) + 64); |
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175 } |
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176 |
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177 @Override |
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178 public void and(PoolSet<T> others) { |
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179 if (others instanceof PoolSet128) { |
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180 final PoolSet128 poolSet128 = (PoolSet128) others; |
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181 setLow &= poolSet128.setLow; |
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182 setHigh &= poolSet128.setHigh; |
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183 } else { |
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184 long oldSetLow = this.setLow; |
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185 while (oldSetLow != 0) { |
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186 final long bit = Long.lowestOneBit(oldSetLow); |
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187 final int serial = bitToSerial(bit); |
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188 oldSetLow &= ~bit; |
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189 if (!others.contains(pool.get(serial))) { |
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190 this.setLow &= ~bit; |
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191 } |
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192 } |
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193 long oldSetHigh = this.setHigh; |
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194 while (oldSetHigh != 0) { |
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195 final long bit = Long.lowestOneBit(oldSetHigh); |
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196 final int serial = bitToSerial(bit) + 64; |
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197 oldSetHigh &= ~bit; |
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198 if (!others.contains(pool.get(serial))) { |
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199 this.setHigh &= ~bit; |
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200 } |
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201 } |
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|
202 } |
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203 } |
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204 |
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|
205 @Override |
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206 public boolean containsAll(PoolSet<T> others) { |
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207 if (others instanceof PoolSet128) { |
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|
208 final PoolSet128 poolSet128 = (PoolSet128) others; |
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209 return (setLow & poolSet128.setLow) == poolSet128.setLow && |
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|
210 (setHigh & poolSet128.setHigh) == poolSet128.setHigh; |
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|
211 } |
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|
212 return super.containsAll(others); |
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|
213 } |
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|
214 |
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|
215 @Override |
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|
216 public PoolSet<T> clone() { |
4142
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Adjust code base to new level of warnings.
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3733
diff
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|
217 final PoolSet128<T> poolSet = new PoolSet128<>(pool); |
3733
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218 poolSet.setLow = setLow; |
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219 poolSet.setHigh = setHigh; |
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220 return poolSet; |
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|
221 } |
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|
222 |
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|
223 /** |
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|
224 * Gets an iterator over all the values in this set. |
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225 */ |
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|
226 public Iterator<T> iterator() { |
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|
227 return new Iterator<T>() { |
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228 |
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|
229 private int count = size(); |
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|
230 private boolean inHighSet; |
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|
231 private long current = setLow; |
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|
232 private long currentBit = -1L; |
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changeset
|
233 public boolean hasNext() { |
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|
234 return count != 0; |
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|
235 } |
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|
236 |
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|
237 public T next() { |
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|
238 if (!hasNext()) { |
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changeset
|
239 throw new NoSuchElementException(); |
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|
240 } |
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|
241 |
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|
242 currentBit = Long.lowestOneBit(current); |
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|
243 if (currentBit == 0) { |
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diff
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|
244 assert !inHighSet; |
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|
245 inHighSet = true; |
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|
246 current = setHigh; |
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|
247 currentBit = Long.lowestOneBit(current); |
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|
248 } |
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|
249 |
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|
250 final int serial = bitToSerial(currentBit); |
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|
251 current &= ~currentBit; |
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diff
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|
252 count--; |
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|
253 if (inHighSet) { |
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|
254 return pool.get(serial + 64); |
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255 } |
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256 return pool.get(serial); |
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257 } |
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258 |
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259 public void remove() { |
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260 if (currentBit == -1L) { |
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261 throw new IllegalStateException(); |
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262 } |
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263 if (inHighSet) { |
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264 setHigh &= ~currentBit; |
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265 } else { |
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266 setLow &= ~currentBit; |
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267 } |
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268 currentBit = -1; |
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269 } |
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270 }; |
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271 } |
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272 } |