Mercurial > hg > blitz_condensed
annotate src/EDU/oswego/cs/dl/util/concurrent/WaitableShort.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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1 /* |
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2 File: WaitableShort.java |
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3 |
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4 Originally written by Doug Lea and released into the public domain. |
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5 This may be used for any purposes whatsoever without acknowledgment. |
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6 Thanks for the assistance and support of Sun Microsystems Labs, |
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7 and everyone contributing, testing, and using this code. |
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8 |
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9 History: |
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10 Date Who What |
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11 23Jun1998 dl Create public version |
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12 */ |
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13 |
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14 package EDU.oswego.cs.dl.util.concurrent; |
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15 |
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16 /** |
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17 * A class useful for offloading waiting and signalling operations |
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18 * on single short variables. |
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19 * <p> |
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20 * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>] |
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21 **/ |
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22 |
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23 public class WaitableShort extends SynchronizedShort { |
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24 /** |
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25 * Make a new WaitableShort with the given initial value, |
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26 * and using its own internal lock. |
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27 **/ |
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28 public WaitableShort(short initialValue) { |
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29 super(initialValue); |
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30 } |
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31 |
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32 /** |
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33 * Make a new WaitableShort with the given initial value, |
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34 * and using the supplied lock. |
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35 **/ |
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36 public WaitableShort(short initialValue, Object lock) { |
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37 super(initialValue, lock); |
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38 } |
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39 |
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40 |
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41 public short set(short newValue) { |
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42 synchronized (lock_) { |
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43 lock_.notifyAll(); |
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44 return super.set(newValue); |
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45 } |
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46 } |
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47 |
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48 public boolean commit(short assumedValue, short newValue) { |
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49 synchronized (lock_) { |
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50 boolean success = super.commit(assumedValue, newValue); |
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51 if (success) lock_.notifyAll(); |
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52 return success; |
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53 } |
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54 } |
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55 |
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56 public short increment() { |
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57 synchronized (lock_) { |
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58 lock_.notifyAll(); |
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59 return super.increment(); |
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60 } |
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61 } |
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62 |
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63 public short decrement() { |
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64 synchronized (lock_) { |
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65 lock_.notifyAll(); |
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66 return super.decrement(); |
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67 } |
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68 } |
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69 |
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70 public short add(short amount) { |
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71 synchronized (lock_) { |
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72 lock_.notifyAll(); |
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73 return super.add(amount); |
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74 } |
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75 } |
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76 |
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77 public short subtract(short amount) { |
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78 synchronized (lock_) { |
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79 lock_.notifyAll(); |
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80 return super.subtract(amount); |
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81 } |
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82 } |
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83 |
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84 public short multiply(short factor) { |
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85 synchronized (lock_) { |
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86 lock_.notifyAll(); |
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87 return super.multiply(factor); |
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88 } |
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89 } |
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90 |
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91 public short divide(short factor) { |
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92 synchronized (lock_) { |
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93 lock_.notifyAll(); |
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94 return super.divide(factor); |
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95 } |
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96 } |
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97 |
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98 |
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99 /** |
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100 * Wait until value equals c, then run action if nonnull. |
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101 * The action is run with the synchronization lock held. |
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102 **/ |
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103 |
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104 public void whenEqual(short c, Runnable action) throws InterruptedException { |
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105 synchronized(lock_) { |
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106 while (!(value_ == c)) lock_.wait(); |
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107 if (action != null) action.run(); |
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108 } |
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109 } |
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110 |
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111 /** |
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112 * wait until value not equal to c, then run action if nonnull. |
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113 * The action is run with the synchronization lock held. |
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114 **/ |
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115 public void whenNotEqual(short c, Runnable action) throws InterruptedException { |
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116 synchronized (lock_) { |
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117 while (!(value_ != c)) lock_.wait(); |
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118 if (action != null) action.run(); |
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119 } |
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120 } |
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121 |
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122 /** |
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123 * wait until value less than or equal to c, then run action if nonnull. |
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124 * The action is run with the synchronization lock held. |
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125 **/ |
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126 public void whenLessEqual(short c, Runnable action) throws InterruptedException { |
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127 synchronized (lock_) { |
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128 while (!(value_ <= c)) lock_.wait(); |
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129 if (action != null) action.run(); |
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130 } |
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131 } |
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132 |
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133 /** |
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134 * wait until value less than c, then run action if nonnull. |
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135 * The action is run with the synchronization lock held. |
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136 **/ |
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137 public void whenLess(short c, Runnable action) throws InterruptedException { |
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138 synchronized (lock_) { |
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139 while (!(value_ < c)) lock_.wait(); |
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140 if (action != null) action.run(); |
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141 } |
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142 } |
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143 |
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144 /** |
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145 * wait until value greater than or equal to c, then run action if nonnull. |
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146 * The action is run with the synchronization lock held. |
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147 **/ |
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148 public void whenGreaterEqual(short c, Runnable action) throws InterruptedException { |
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149 synchronized (lock_) { |
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150 while (!(value_ >= c)) lock_.wait(); |
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151 if (action != null) action.run(); |
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152 } |
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153 } |
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154 |
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155 /** |
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156 * wait until value greater than c, then run action if nonnull. |
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157 * The action is run with the synchronization lock held. |
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158 **/ |
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159 public void whenGreater(short c, Runnable action) throws InterruptedException { |
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160 synchronized (lock_) { |
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161 while (!(value_ > c)) lock_.wait(); |
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162 if (action != null) action.run(); |
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163 } |
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164 } |
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165 |
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166 } |
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167 |