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