DRAND48R(3) Linux Programmer's Manual DRAND48R(3)

NAME
       drand48r,   erand48r,  lrand48r,  nrand48r,  mrand48r,  jrand48r,
       srand48r, seed48r, lcong48r - generate uniformly distributed pseudo-
       random numbers reentrantly

SYNOPSIS
       #include 

       int drand48r(struct drand48data *buffer, double *result);

       int erand48r(unsigned short xsubi[3],
                     struct drand48data *buffer, double *result);

       int lrand48r(struct drand48data *buffer, long int *result);

       int nrand48r(unsigned short int xsubi[3],
                     struct drand48data *buffer, long int *result);

       int mrand48r(struct drand48data *buffer,long int *result);

       int jrand48r(unsigned short int xsubi[3],
                     struct drand48data *buffer, long int *result);

       int srand48r(long int seedval, struct drand48data *buffer);

       int seed48r(unsigned short int seed16v[3],
                    struct drand48data *buffer);

       int lcong48r(unsigned short int param[7],
                     struct drand48data *buffer);

   Feature Test Macro Requirements for glibc (see featuretestmacros(7)):

       All functions shown above: SVIDSOURCE || BSDSOURCE || XOPENSOURCE

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 zeros, or by calling one of the functions  srand48r(),
       seed48r(), or lcong48r().

RETURN VALUE
       The return value is 0.

ATTRIBUTES
       For   an   explanation   of   the  terms  used  in  this  section,  see
       attributes(7).

       ┌───────────────────────────────────────┬───────────────┬─────────────────────┐
       │Interface                              │ Attribute     │ Value               │
       ├───────────────────────────────────────┼───────────────┼─────────────────────┤
       │drand48r(), erand48r(), lrand48r(), │ Thread safety │ MT-Safe race:buffer │
       │nrand48r(), mrand48r(), jrand48r(), │               │                     │
       │srand48r(), seed48r(), lcong48r()   │               │                     │
       └───────────────────────────────────────┴───────────────┴─────────────────────┘
CONFORMING TO
       These functions are GNU extensions and are not portable.

SEE ALSO
       drand48(3), rand(3), random(3)

COLOPHON
       This page is part of release 3.53 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                      DRAND48R(3)