Name
drand48_r, erand48_r, lrand48_r, nrand48_r, mrand48_r,
jrand48_r, srand48_r, seed48_r, lcong48_r — generate
uniformly distributed pseudo-random numbers reentrantly
Synopsis
#include <stdlib.h>
int
drand48_r( |
struct drand48_data
* |
buffer, |
|
double * |
result) ; |
int
erand48_r( |
unsigned short |
xsubi[3], |
|
struct drand48_data
* |
buffer, |
|
double * |
result) ; |
int
lrand48_r( |
struct drand48_data
* |
buffer, |
|
long int * |
result) ; |
int
nrand48_r( |
unsigned short int
|
xsubi[3], |
|
struct drand48_data
* |
buffer, |
|
long int * |
result) ; |
int
mrand48_r( |
struct drand48_data
* |
buffer, |
|
long int * |
result) ; |
int
jrand48_r( |
unsigned short int
|
xsubi[3], |
|
struct drand48_data
* |
buffer, |
|
long int * |
result) ; |
int
srand48_r( |
long int |
seedval, |
|
struct drand48_data
* |
buffer) ; |
int
seed48_r( |
unsigned short int
|
seed16v[3], |
|
struct drand48_data
* |
buffer) ; |
int
lcong48_r( |
unsigned short int
|
param[7], |
|
struct drand48_data
* |
buffer) ; |
DESCRIPTION
These functions are the reentrant analogs of the functions
described in drand48(3). Instead of
modifying the global random generator state, they use the
supplied data buffer
.
Before the first use, this struct must be initialized, for
example, by filling it with zeroes, or by calling one of the
functions srand48_r
(),
seed48_r
(), or lcong48_r
().
RETURN VALUE
The return value is 0.
CONFORMING TO
These functions are GNU extensions and are not
portable.
SEE ALSO
drand48(3), rand(3), random(3)
Copyright 2003 Walter Harms, 2004 Andries Brouwer <aeb@cwi.nl>.
Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.
Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.
Since the Linux kernel and libraries are constantly changing, this
manual page may be incorrect or out-of-date. The author(s) assume no
responsibility for errors or omissions, or for damages resulting from
the use of the information contained herein. The author(s) may not
have taken the same level of care in the production of this manual,
which is licensed free of charge, as they might when working
professionally.
Formatted or processed versions of this manual, if unaccompanied by
the source, must acknowledge the copyright and authors of this work.
Created 2004-10-31. Text taken from a page by Walter Harms, 2003-09-08
|