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| <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_barrierattr_destroy, pthread_barrierattr_init - destroy | |
| and initialize the barrier attributes object (<B>ADVANCED REALTIME | |
| THREADS</B>) | |
| </P> | |
| <H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> | |
| <P><B>#include <pthread.h> </B> | |
| </P> | |
| <P>i<B>nt pthread_barrierattr_destroy(pthread_barrierattr_t *</B><I>attr</I><B>); | |
| <BR>int pthread_barrierattr_init(pthread_barrierattr_t *</B><I>attr</I><B>); | |
| </B> | |
| </P> | |
| <H2><A HREF="#toc2" NAME="sect2">Description</A></H2> | |
| <P>The <B>pthread_barrierattr_destroy</B> function shall destroy a | |
| barrier attributes object. A destroyed <I>attr</I> attributes object | |
| can be reinitialized using <B>pthread_barrierattr_init</B> ; the | |
| results of otherwise referencing the object after it has been | |
| destroyed are undefined. An implementation may cause | |
| <B>pthread_barrierattr_destroy</B> to set the object referenced by | |
| <I>attr</I> to an invalid value. | |
| </P> | |
| <P>The <B>pthread_barrierattr_init</B> function shall initialize a | |
| barrier attributes object <I>attr</I> with the default value for all | |
| of the attributes defined by the implementation. | |
| </P> | |
| <P>Results are undefined if <B>pthread_barrierattr_init</B> is called | |
| specifying an already initialized <I>attr</I> attributes object. | |
| </P> | |
| <P>After a barrier attributes object has been used to initialize one | |
| or more barriers, any function affecting the attributes object | |
| (including destruction) shall not affect any previously initialized | |
| barrier. | |
| </P> | |
| <H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2> | |
| <P>If successful, the <B>pthread_barrierattr_destroy</B> and | |
| <B>pthread_barrierattr_init</B> functions shall return zero; | |
| otherwise, an error number shall be returned to indicate the error. | |
| </P> | |
| <H2><A HREF="#toc4" NAME="sect4">Errors</A></H2> | |
| <P>The <B>pthread_barrierattr_destroy</B> function may fail if: | |
| </P> | |
| <DL> | |
| <DT><B>EINVAL</B> | |
| </DT><DD STYLE="margin-bottom: 0.5cm"> | |
| The value specified by <I>attr</I> is invalid. | |
| </DD></DL> | |
| <P> | |
| The <B>pthread_barrierattr_init</B> function shall fail if: | |
| </P> | |
| <DL> | |
| <DT><B>ENOMEM</B> | |
| </DT><DD STYLE="margin-bottom: 0.5cm"> | |
| Insufficient memory exists to initialize the barrier attributes | |
| object. | |
| </DD></DL> | |
| <P> | |
| These functions shall not return an error code of [EINTR]. | |
| </P> | |
| <P><I>The following sections are informative.</I> | |
| </P> | |
| <H2><A HREF="#toc5" NAME="sect5">Examples</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc6" NAME="sect6">Application Usage</A></H2> | |
| <P>The <B>pthread_barrierattr_destroy</B> and | |
| <B>pthread_barrierattr_init</B> functions are part of the Barriers | |
| option and need not be provided on all implementations. | |
| </P> | |
| <P><B>Pthreads-w32</B> defines <B>_POSIX_BARRIERS</B> to indicate | |
| that these routines are implemented and may be used.</P> | |
| <H2><A HREF="#toc7" NAME="sect7">Rationale</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc8" NAME="sect8">Future Directions</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc9" NAME="sect9">See Also</A></H2> | |
| <P><A HREF="pthread_barrierattr_setpshared.html"><B>pthread_barrierattr_getpshared</B>(3)</A> | |
| <B>,</B> <A HREF="pthread_barrierattr_setpshared.html"><B>pthread_barrierattr_setpshared</B>(3)</A> | |
| , the Base Definitions volume of IEEE Std 1003.1-2001, | |
| <I><pthread.h></I>. | |
| </P> | |
| <H2><A HREF="#toc10" NAME="sect10">Copyright</A></H2> | |
| <P>Portions of this text are reprinted and reproduced in electronic | |
| form from IEEE Std 1003.1, 2003 Edition, Standard for Information | |
| Technology -- Portable Operating System Interface (POSIX), The Open | |
| Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the | |
| Institute of Electrical and Electronics Engineers, Inc and The Open | |
| Group. In the event of any discrepancy between this version and the | |
| original IEEE and The Open Group Standard, the original IEEE and The | |
| Open Group Standard is the referee document. The original Standard | |
| can be obtained online at <A HREF="http://www.opengroup.org/unix/online.html">http://www.opengroup.org/unix/online.html</A> | |
| . | |
| </P> | |
| <P>Modified by Ross Johnson for use with <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</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">Examples</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect6" NAME="toc6">Application | |
| Usage</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect7" NAME="toc7">Rationale</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect8" NAME="toc8">Future | |
| Directions</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect9" NAME="toc9">See | |
| Also</A> | |
| </P> | |
| <LI><P><A HREF="#sect10" NAME="toc10">Copyright</A> | |
| </P> | |
| </UL> | |
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