rng.c File Reference

Uniform and Normal RNG Implemented in OpenMP. More...

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <sys/time.h>
#include <omp.h>
#include <limits.h>

Defines
#define	PI   acos(-1)
Functions
double	randu (int *seed, int index)
double	randn (int *seed, int index)
int	main ()
Variables
long	M = INT_MAX
int	A = 1103515245
int	C = 12345

---

Detailed Description

Uniform and Normal RNG Implemented in OpenMP.

Author:

Michael Trotter & Matt Goodrum

---

Function Documentation

int main

(

)

A simple main that demonstrates how to setup the seed array for use

double randn	(	int *	seed,
		int	index
	)

Generates a normally distributed random number using the Box-Muller transformation

Note:

This function is thread-safe

Parameters:

	seed	The seed array
	index	The specific index of the seed to be advanced

Returns:

a double representing random number generated using the Box-Muller algorithm

See also:

http://en.wikipedia.org/wiki/Normal_distribution, section computing value for normal random distribution

double randu	(	int *	seed,
		int	index
	)

Generates a uniformly distributed random number using the provided seed and GCC's settings for the Linear Congruential Generator (LCG)

See also:

http://en.wikipedia.org/wiki/Linear_congruential_generator

Note:

This function is thread-safe

Parameters:

	seed	The seed array
	index	The specific index of the seed to be advanced

Returns:

a uniformly distributed number [0, 1)