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143 lines
5.7 KiB
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8">
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<TITLE>"PTHREAD_BARRIERATTR_DESTROY"(P) 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_barrierattr_destroy, pthread_barrierattr_init - destroy
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and initialize the barrier attributes object (<B>ADVANCED REALTIME
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THREADS</B>)
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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>i<B>nt pthread_barrierattr_destroy(pthread_barrierattr_t *</B><I>attr</I><B>);
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<BR>int pthread_barrierattr_init(pthread_barrierattr_t *</B><I>attr</I><B>);
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</B>
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</P>
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<H2><A HREF="#toc2" NAME="sect2">Description</A></H2>
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<P>The <B>pthread_barrierattr_destroy</B> function shall destroy a
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barrier attributes object. A destroyed <I>attr</I> attributes object
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can be reinitialized using <B>pthread_barrierattr_init</B> ; the
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results of otherwise referencing the object after it has been
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destroyed are undefined. An implementation may cause
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<B>pthread_barrierattr_destroy</B> to set the object referenced by
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<I>attr</I> to an invalid value.
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</P>
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<P>The <B>pthread_barrierattr_init</B> function shall initialize a
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barrier attributes object <I>attr</I> with the default value for all
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of the attributes defined by the implementation.
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</P>
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<P>Results are undefined if <B>pthread_barrierattr_init</B> is called
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specifying an already initialized <I>attr</I> attributes object.
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</P>
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<P>After a barrier attributes object has been used to initialize one
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or more barriers, any function affecting the attributes object
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(including destruction) shall not affect any previously initialized
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barrier.
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</P>
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<H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2>
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<P>If successful, the <B>pthread_barrierattr_destroy</B> and
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<B>pthread_barrierattr_init</B> functions shall return zero;
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otherwise, an error number shall be returned to indicate the error.
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</P>
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<H2><A HREF="#toc4" NAME="sect4">Errors</A></H2>
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<P>The <B>pthread_barrierattr_destroy</B> function may fail if:
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</P>
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<DL>
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<DT><B>EINVAL</B>
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</DT><DD STYLE="margin-bottom: 0.5cm">
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The value specified by <I>attr</I> is invalid.
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</DD></DL>
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<P>
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The <B>pthread_barrierattr_init</B> function shall fail if:
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</P>
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<DL>
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<DT><B>ENOMEM</B>
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</DT><DD STYLE="margin-bottom: 0.5cm">
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Insufficient memory exists to initialize the barrier attributes
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object.
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</DD></DL>
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<P>
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These functions shall not return an error code of [EINTR].
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</P>
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<P><I>The following sections are informative.</I>
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</P>
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<H2><A HREF="#toc5" NAME="sect5">Examples</A></H2>
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<P>None.
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</P>
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<H2><A HREF="#toc6" NAME="sect6">Application Usage</A></H2>
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<P>The <B>pthread_barrierattr_destroy</B> and
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<B>pthread_barrierattr_init</B> functions are part of the Barriers
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option and need not be provided on all implementations.
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</P>
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<P><B>Pthreads-w32</B> defines <B>_POSIX_BARRIERS</B> to indicate
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that these routines are implemented and may be used.</P>
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<H2><A HREF="#toc7" NAME="sect7">Rationale</A></H2>
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<P>None.
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</P>
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<H2><A HREF="#toc8" NAME="sect8">Future Directions</A></H2>
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<P>None.
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</P>
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<H2><A HREF="#toc9" NAME="sect9">See Also</A></H2>
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<P><A HREF="pthread_barrierattr_setpshared.html"><B>pthread_barrierattr_getpshared</B>(3)</A>
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<B>,</B> <A HREF="pthread_barrierattr_setpshared.html"><B>pthread_barrierattr_setpshared</B>(3)</A>
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, the Base Definitions volume of IEEE Std 1003.1-2001,
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<I><pthread.h></I>.
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</P>
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<H2><A HREF="#toc10" NAME="sect10">Copyright</A></H2>
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<P>Portions of this text are reprinted and reproduced in electronic
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form from IEEE Std 1003.1, 2003 Edition, Standard for Information
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Technology -- Portable Operating System Interface (POSIX), The Open
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Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the
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Institute of Electrical and Electronics Engineers, Inc and The Open
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Group. In the event of any discrepancy between this version and the
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original IEEE and The Open Group Standard, the original IEEE and The
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Open Group Standard is the referee document. The original Standard
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can be obtained online at <A HREF="http://www.opengroup.org/unix/online.html">http://www.opengroup.org/unix/online.html</A>
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.
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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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<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">Examples</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect6" NAME="toc6">Application
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Usage</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect7" NAME="toc7">Rationale</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect8" NAME="toc8">Future
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Directions</A>
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</P>
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<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect9" NAME="toc9">See
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Also</A>
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</P>
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<LI><P><A HREF="#sect10" NAME="toc10">Copyright</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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