/*
* @(#)$Id: codetemplate_xbird.xml 943 2006-09-13 07:03:37Z yui $
*
* Copyright (c) 2005-2006 Makoto YUI and Project XBird
* All rights reserved.
*
* This file is part of XBird and is distributed under the terms of
* the Common Public License v1.0.
*
* Contributors:
* Makoto YUI - initial implementation
*/
//package xbird.util.concurrent.lang;
import java.util.concurrent.atomic.AtomicLong;
/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI ([email protected])
*/
public final class AtomicSimpleRandom {
private final static long multiplier = 0x5DEECE66DL;
private final static long addend = 0xBL;
private final static long mask = (1L << 48) - 1;
private static final AtomicLong seq = new AtomicLong(-715159705);
private long seed;
public AtomicSimpleRandom(long s) {
this.seed = s;
}
public AtomicSimpleRandom() {
this.seed = System.nanoTime() + seq.getAndAdd(129);
}
public void setSeed(long s) {
seed = s;
}
public int nextInt() {
return next();
}
public int next() {
long nextseed = (seed * multiplier + addend) & mask;
this.seed = nextseed;
return ((int) (nextseed >>> 17)) & 0x7FFFFFFF;
}
public int next(int bits) {
long nextseed = (seed * multiplier + addend) & mask;
this.seed = nextseed;
return (int) (nextseed >>> (48 - bits));
}
}
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