<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8"> <TITLE>PTHREAD_CONDATTR(3) manual page</TITLE> <META NAME="GENERATOR" CONTENT="OpenOffice.org 1.1.3 (Linux)"> <META NAME="CREATED" CONTENT="20050504;16375600"> <META NAME="CHANGED" CONTENT="20050504;16570300"> <!-- manual page source format generated by PolyglotMan v3.2, --> <!-- available at http://polyglotman.sourceforge.net/ --> </HEAD> <BODY LANG="en-GB" BGCOLOR="#ffffff" DIR="LTR"> <H4>POSIX Threads for Windows – REFERENCE - <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A></H4> <P><A HREF="index.html">Reference Index</A></P> <P><A HREF="#toc">Table of Contents</A></P> <H2><A HREF="#toc0" NAME="sect0">Name</A></H2> <P>pthread_condattr_init, pthread_condattr_destroy - condition creation </P> <P>attributes </P> <H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> <P><B>#include <pthread.h></B> </P> <P><B>int pthread_condattr_init(pthread_condattr_t *</B><I>attr</I><B>);</B> </P> <P><B>int pthread_condattr_destroy(pthread_condattr_t *</B><I>attr</I><B>);</B> </P> <H2><A HREF="#toc2" NAME="sect2">Description</A></H2> <P>Condition attributes can be specified at condition creation time, by passing a condition attribute object as second argument to <A HREF="pthread_cond_init.html"><B>pthread_cond_init</B>(3)</A> . Passing <B>NULL</B> is equivalent to passing a condition attribute object with all attributes set to their default values. </P> <P><B>pthread_condattr_init</B> initializes the condition attribute object <I>attr</I> and fills it with default values for the attributes. <B>pthread_condattr_destroy</B> destroys a condition attribute object, which must not be reused until it is reinitialized.</P> <P><B>Pthreads-w32</B> defines _<B>POSIX_THREAD_PROCESS_SHARED</B> in pthread.h as -1 to indicate that the attribute routines are implemented but that the process shared attribute is not supported.</P> <H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2> <P>All condition variable functions return 0 on success and a non-zero error code on error.</P> <H2><A HREF="#toc4" NAME="sect4">Errors</A></H2> <P>The <B>pthread_condattr_init</B> function returns the following error code on error: </P> <DL> <DL> <DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>ENOMEM</B> </DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> The was insufficient memory to create the attribute.<SPAN STYLE="font-weight: medium"> </SPAN> </DD></DL> </DL> <P> The <B>pthread_condattr_destroy</B> function returns the following error code on error: </P> <DL> <DL> <DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>EINVAL</B> </DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> The <I>attr</I> argument is not valid.<SPAN STYLE="font-weight: medium"> </SPAN> </DD></DL> </DL> <H2> <A HREF="#toc5" NAME="sect5">Author</A></H2> <P>Xavier Leroy <Xavier.Leroy@inria.fr> </P> <P>Modified by Ross Johnson for use with <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A>.</P> <H2><A HREF="#toc6" NAME="sect6">See Also</A></H2> <P><A HREF="pthread_cond_init.html"><B>pthread_cond_init</B>(3)</A> . </P> <HR> <P><A NAME="toc"></A><B>Table of Contents</B></P> <UL> <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect0" NAME="toc0">Name</A> </P> <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect1" NAME="toc1">Synopsis</A> </P> <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect2" NAME="toc2">Description</A> </P> <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect3" NAME="toc3">Return Value</A> </P> <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect4" NAME="toc4">Errors</A> </P> <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect5" NAME="toc5">Author</A> </P> <LI><P><A HREF="#sect6" NAME="toc6">See Also</A> </P> </UL> </BODY> </HTML>