148 lines
5.3 KiB
HTML
148 lines
5.3 KiB
HTML
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<title>pthread_barrierattr_destroy</title>
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<basefont size="3"> <a name="pthread_barrierattr_destroy"></a> <a name="tag_03_509"></a><!-- pthread_barrierattr_destroy -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_509_01"></a>NAME</h4>
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<blockquote>pthread_barrierattr_destroy, pthread_barrierattr_init - destroy and initialize the barrier attributes object
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(<b>ADVANCED REALTIME THREADS</b>)</blockquote>
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<h4><a name="tag_03_509_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><code><tt><sup>[<a href="javascript:open_code('THR BAR')">THR BAR</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <<a href="../basedefs/pthread.h.html">pthread.h</a>><br>
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<br>
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int pthread_barrierattr_destroy(pthread_barrierattr_t *</tt><i>attr</i><tt>);<br>
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int pthread_barrierattr_init(pthread_barrierattr_t *</tt><i>attr</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]"
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border="0"></tt></code></div>
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<tt><br>
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</tt></blockquote>
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<h4><a name="tag_03_509_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>pthread_barrierattr_destroy</i>() function shall destroy a barrier attributes object. A destroyed <i>attr</i> attributes
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object can be reinitialized using <i>pthread_barrierattr_init</i>(); the results of otherwise referencing the object after it has
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been destroyed are undefined. An implementation may cause <i>pthread_barrierattr_destroy</i>() to set the object referenced by
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<i>attr</i> to an invalid value.</p>
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<p>The <i>pthread_barrierattr_init</i>() function shall initialize a barrier attributes object <i>attr</i> with the default value
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for all of the attributes defined by the implementation.</p>
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<p>Results are undefined if <i>pthread_barrierattr_init</i>() is called specifying an already initialized <i>attr</i> attributes
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object.</p>
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<p>After a barrier attributes object has been used to initialize one or more barriers, any function affecting the attributes object
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(including destruction) shall not affect any previously initialized barrier.</p>
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</blockquote>
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<h4><a name="tag_03_509_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>If successful, the <i>pthread_barrierattr_destroy</i>() and <i>pthread_barrierattr_init</i>() functions shall return zero;
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otherwise, an error number shall be returned to indicate the error.</p>
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</blockquote>
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<h4><a name="tag_03_509_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>pthread_barrierattr_destroy</i>() function may fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd>The value specified by <i>attr</i> is invalid.</dd>
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</dl>
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<p>The <i>pthread_barrierattr_init</i>() function shall fail if:</p>
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<dl compact>
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<dt>[ENOMEM]</dt>
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<dd>Insufficient memory exists to initialize the barrier attributes object.</dd>
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</dl>
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<p>These functions shall not return an error code of [EINTR].</p>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_509_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_509_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>The <i>pthread_barrierattr_destroy</i>() and <i>pthread_barrierattr_init</i>() functions are part of the Barriers option and
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need not be provided on all implementations.</p>
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</blockquote>
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<h4><a name="tag_03_509_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_509_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_509_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="pthread_barrierattr_getpshared.html"><i>pthread_barrierattr_getpshared</i>()</a> , <a href=
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"pthread_barrierattr_setpshared.html"><i>pthread_barrierattr_setpshared</i>()</a> , the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/pthread.h.html"><i><pthread.h></i></a>.</p>
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</blockquote>
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<h4><a name="tag_03_509_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 6. Derived from IEEE Std 1003.1j-2000.</p>
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<p>In the SYNOPSIS, the inclusion of <a href="../basedefs/sys/types.h.html"><i><sys/types.h></i></a> is no longer
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required.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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