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//******************************************************************************
//
// File: Random.h
//
// This C source file is copyright (C) 2008 by Alan Kaminsky. All rights
// reserved. For further information, contact the author, Alan Kaminsky, at
// ark@cs.rit.edu.
//
// This C source file is part of the Parallel Java Library ("PJ"). PJ is free
// software; you can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// PJ is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
// A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// A copy of the GNU General Public License is provided in the file gpl.txt. You
// may also obtain a copy of the GNU General Public License on the World Wide
// Web at http://www.gnu.org/licenses/gpl.html.
//
//******************************************************************************
typedef struct
{
// Seed for this PRNG.
unsigned long long int seed;
// 128 bytes of extra padding to avert cache interference.
long long int p0, p1, p2, p3, p4, p5, p6, p7;
long long int p8, p9, pa, pb, pc, pd, pe, pf;
}
Random;
// Exported operations.
/**
* Set this PRNG's seed. Any seed value is allowed.
*
* @param seed Seed.
*/
void setSeed
(Random *this,
unsigned long long int seed);
/**
* Skip the given number of positions ahead in this PRNG's sequence. If
* <TT>skip</TT> <= 0, the <TT>skip()</TT> method does nothing.
*
* @param skip Number of positions to skip.
*/
void skip
(Random *this,
long long int skip);
/**
* Return the double precision floating point value from the next
* pseudorandom value in this PRNG's sequence. The returned numbers have a
* uniform distribution in the range 0.0 (inclusive) to 1.0 (exclusive).
*
* @return Double value.
*/
double nextDouble
(Random *this);
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