171 lines
4.5 KiB
HTML
171 lines
4.5 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of DRAND48_R</TITLE>
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</HEAD><BODY>
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<H1>DRAND48_R</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2017-09-15<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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drand48_r, erand48_r, lrand48_r, nrand48_r, mrand48_r, jrand48_r,
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srand48_r, seed48_r, lcong48_r
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- generate uniformly distributed pseudo-random numbers reentrantly
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<PRE>
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<B>#include <<A HREF="file:///usr/include/stdlib.h">stdlib.h</A>></B>
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<B>int drand48_r(struct drand48_data *</B><I>buffer</I><B>, double *</B><I>result</I><B>);</B>
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<B>int erand48_r(unsigned short </B><I>xsubi</I><B>[3]</B><I>,</I>
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<B> struct drand48_data *buffer</B><I>, double *</I><B>result</B><I>);</I>
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<B>int lrand48_r(struct drand48_data *</B><I>buffer</I><B>, long int *</B><I>result</I><B>);</B>
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<B>int nrand48_r(unsigned short int </B><I>xsubi[3]</I><B>,</B>
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<B> struct drand48_data *buffer</B><I>, long int *</I><B>result</B><I>);</I>
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<B>int mrand48_r(struct drand48_data *</B><I>buffer</I><B>,long int *</B><I>result</I><B>);</B>
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<B>int jrand48_r(unsigned short int </B><I>xsubi[3]</I><B>,</B>
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<B> struct drand48_data *</B><I>buffer</I><B>, long int *</B><I>result</I><B>);</B>
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<B>int srand48_r(long int </B><I>seedval</I><B>, struct drand48_data *</B><I>buffer</I><B>);</B>
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<B>int seed48_r(unsigned short int </B><I>seed16v[3]</I><B>,</B>
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<B> struct drand48_data *</B><I>buffer</I><B>);</B>
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<B>int lcong48_r(unsigned short int </B><I>param[7]</I><B>,</B>
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<B> struct drand48_data *</B><I>buffer</I><B>);</B>
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</PRE>
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<P>
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Feature Test Macro Requirements for glibc (see
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<B><A HREF="/cgi-bin/man/man2html?7+feature_test_macros">feature_test_macros</A></B>(7)):
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<P>
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All functions shown above:
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<BR> /* Glibc since 2.19: */ _DEFAULT_SOURCE
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<BR> || /* Glibc versions <= 2.19: */ _SVID_SOURCE || _BSD_SOURCE
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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These functions are the reentrant analogs of the functions described in
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<B><A HREF="/cgi-bin/man/man2html?3+drand48">drand48</A></B>(3).
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Instead of modifying the global random generator state, they use
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the supplied data
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<I>buffer</I>.
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<P>
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Before the first use, this struct must be initialized, for example,
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by filling it with zeros, or by calling one of the functions
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<B>srand48_r</B>(),
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<B>seed48_r</B>(),
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or
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<B>lcong48_r</B>().
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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The return value is 0.
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<A NAME="lbAF"> </A>
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<H2>ATTRIBUTES</H2>
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For an explanation of the terms used in this section, see
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<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
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<TABLE BORDER>
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<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
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<TR VALIGN=top><TD>
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<B>drand48_r</B>(),
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<B>erand48_r</B>(),
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<B>lrand48_r</B>(),
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<B>nrand48_r</B>(),
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<B>mrand48_r</B>(),
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<B>jrand48_r</B>(),
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<B>srand48_r</B>(),
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<B>seed48_r</B>(),
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<B>lcong48_r</B>()
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</TD><TD>Thread safety</TD><TD>MT-Safe race:buffer<BR></TD></TR>
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</TABLE>
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<A NAME="lbAG"> </A>
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<H2>CONFORMING TO</H2>
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These functions are GNU extensions and are not portable.
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<A NAME="lbAH"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?3+drand48">drand48</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+rand">rand</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+random">random</A></B>(3)
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<A NAME="lbAI"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="5"><A HREF="#lbAF">ATTRIBUTES</A><DD>
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<DT id="6"><A HREF="#lbAG">CONFORMING TO</A><DD>
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<DT id="7"><A HREF="#lbAH">SEE ALSO</A><DD>
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<DT id="8"><A HREF="#lbAI">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:39 GMT, March 31, 2021
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