| NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | CONFORMING TO | SEE ALSO | COLOPHON | The Linux Programming Interface |
DRAND48_R(3) Linux Programmer's Manual DRAND48_R(3)
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
#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);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
All functions shown above: _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE
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 zeros, or by calling one of the functions srand48_r(), seed48_r(), or
lcong48_r().
The return value is 0.
These functions are GNU extensions and are not portable.
drand48(3), rand(3), random(3)
This page is part of release 3.32 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can be found
at http://www.kernel.org/doc/man-pages/.
GNU 2007-07-26 DRAND48_R(3)
HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface