Mercurial > hg > truffle
annotate graal/com.oracle.max.base/src/com/sun/max/collect/PoolSet64.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 64 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 PoolSet64<T extends PoolObject> extends PoolSet<T> { |
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36 |
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37 public static final int MAX_POOL_SIZE = 64; |
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38 |
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39 /** |
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40 * Bit vector representation 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 set; |
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43 |
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44 /** |
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45 * Creates an empty pool set for a pool with 64objects or less. |
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46 */ |
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47 public PoolSet64(Pool<T> pool) { |
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48 super(pool); |
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49 assert pool.length() <= MAX_POOL_SIZE : pool.length() + " > " + MAX_POOL_SIZE; |
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50 } |
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51 |
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52 @Override |
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53 public int size() { |
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54 return Long.bitCount(set); |
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55 } |
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56 |
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57 @Override |
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58 public void clear() { |
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59 set = 0L; |
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60 } |
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61 |
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62 @Override |
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63 public boolean isEmpty() { |
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64 return set == 0L; |
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65 } |
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66 |
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67 private static int bitToSerial(long bit) { |
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68 assert bit != 0 && Longs.isPowerOfTwoOrZero(bit); |
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69 return Long.numberOfTrailingZeros(bit); |
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70 } |
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71 |
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72 private static long serialToBit(int serial) { |
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73 assert serial >= 0 && serial < MAX_POOL_SIZE; |
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74 return 1L << serial; |
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75 } |
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76 |
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77 @Override |
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78 public boolean contains(T value) { |
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79 if (value == null) { |
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80 return false; |
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81 } |
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82 |
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83 final int serial = value.serial(); |
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84 assert pool.get(serial) == value; |
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85 return (serialToBit(serial) & set) != 0; |
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86 } |
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87 |
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88 @Override |
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89 public void add(T value) { |
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90 final int serial = value.serial(); |
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91 assert pool.get(serial) == value; |
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92 set |= serialToBit(serial); |
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93 } |
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94 |
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95 @Override |
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96 public PoolSet64<T> addAll() { |
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97 final int poolLength = pool.length(); |
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98 if (poolLength != 0) { |
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99 final long highestBit = 1L << poolLength - 1; |
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100 set = highestBit | (highestBit - 1); |
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101 assert size() == poolLength; |
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102 } |
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103 return this; |
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104 } |
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105 |
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106 @Override |
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107 public void or(PoolSet<T> others) { |
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108 if (others instanceof PoolSet64) { |
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109 final PoolSet64 poolSet64 = (PoolSet64) others; |
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110 set |= poolSet64.set; |
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111 } else { |
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112 if (!others.isEmpty()) { |
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113 for (T element : others) { |
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114 add(element); |
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115 } |
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116 } |
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117 } |
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118 } |
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119 |
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120 @Override |
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121 public boolean remove(T value) { |
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122 if (!isEmpty()) { |
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123 final int serial = value.serial(); |
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124 assert pool.get(serial) == value; |
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125 final long bit = serialToBit(serial); |
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126 final boolean present = (set & bit) != 0; |
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127 set &= ~bit; |
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128 return present; |
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129 } |
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130 return false; |
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131 } |
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132 |
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133 @Override |
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134 public T removeOne() { |
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135 if (isEmpty()) { |
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136 throw new NoSuchElementException(); |
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137 } |
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138 final long bit = Long.lowestOneBit(set); |
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139 set &= ~bit; |
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140 return pool.get(bitToSerial(bit)); |
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141 } |
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142 |
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143 @Override |
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144 public void and(PoolSet<T> others) { |
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145 if (others instanceof PoolSet64) { |
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146 final PoolSet64 poolSet64 = (PoolSet64) others; |
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147 set &= poolSet64.set; |
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148 } else { |
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149 long oldSet = this.set; |
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150 while (oldSet != 0) { |
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151 final long bit = Long.lowestOneBit(oldSet); |
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152 final int serial = bitToSerial(bit); |
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153 oldSet &= ~bit; |
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154 if (!others.contains(pool.get(serial))) { |
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155 this.set &= ~bit; |
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156 } |
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157 } |
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158 } |
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159 } |
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160 |
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161 @Override |
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162 public boolean containsAll(PoolSet<T> others) { |
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163 if (others instanceof PoolSet64) { |
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164 final PoolSet64 poolSet64 = (PoolSet64) others; |
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165 return (set & poolSet64.set) == poolSet64.set; |
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166 } |
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167 return super.containsAll(others); |
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168 } |
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169 |
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170 @Override |
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171 public PoolSet<T> clone() { |
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172 final PoolSet64<T> clone = new PoolSet64<>(pool); |
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173 clone.set = set; |
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174 return clone; |
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175 } |
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176 |
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177 /** |
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178 * Gets an iterator over all the values in this set. |
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179 */ |
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180 public Iterator<T> iterator() { |
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181 return new Iterator<T>() { |
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182 |
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183 private long current = set; |
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184 private long currentBit = -1L; |
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185 public boolean hasNext() { |
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186 return current != 0; |
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187 } |
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188 |
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189 public T next() { |
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190 if (!hasNext()) { |
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191 throw new NoSuchElementException(); |
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192 } |
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193 |
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194 currentBit = Long.lowestOneBit(current); |
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195 final int serial = bitToSerial(currentBit); |
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196 current &= ~currentBit; |
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197 return pool.get(serial); |
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198 } |
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199 |
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200 public void remove() { |
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201 if (currentBit == -1L) { |
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202 throw new IllegalStateException(); |
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203 } |
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204 |
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205 set &= ~currentBit; |
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206 currentBit = -1; |
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207 } |
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208 }; |
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209 } |
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210 } |