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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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*/ |
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/** |
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* Misc utilities in JSR166 performance tests |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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import java.util.concurrent.*; |
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import java.util.concurrent.atomic.*; |
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/** |
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* Misc utilities in JSR166 performance tests |
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*/ |
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class LoopHelpers { |
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static final SimpleRandom staticRNG = new SimpleRandom(); |
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public static final class XorShift32Random { |
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static final AtomicInteger seq = new AtomicInteger(8862213); |
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int x = -1831433054; |
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public XorShift32Random(int seed) { x = seed; } |
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public XorShift32Random(int seed) { x = seed; } |
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public XorShift32Random() { |
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this((int) System.nanoTime() + seq.getAndAdd(129)); |
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} |