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+<table class="head">
+ <tr>
+ <td class="head-ltitle">PTHREAD_RWLOCKATTR_GETPSHARED(3)</td>
+ <td class="head-vol">Library Functions Manual</td>
+ <td class="head-rtitle">PTHREAD_RWLOCKATTR_GETPSHARED(3)</td>
+ </tr>
+</table>
+<div class="manual-text">
+<section class="Sh">
+<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
+<p class="Pp"><code class="Nm">pthread_rwlockattr_getpshared</code> &#x2014;
+ <span class="Nd">get the process shared attribute</span></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="LIBRARY"><a class="permalink" href="#LIBRARY">LIBRARY</a></h1>
+<p class="Pp"><span class="Lb">POSIX Threads Library (libpthread,
+ -lpthread)</span></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
+<p class="Pp"><code class="In">#include
+ &lt;<a class="In">pthread.h</a>&gt;</code></p>
+<p class="Pp"><var class="Ft">int</var>
+ <br/>
+ <code class="Fn">pthread_rwlockattr_getpshared</code>(<var class="Fa">const
+ pthread_rwlockattr_t *restrict attr</var>, <var class="Fa">int *restrict
+ pshared</var>);</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">The
+ <a class="permalink" href="#pthread_rwlockattr_getpshared"><code class="Fn" id="pthread_rwlockattr_getpshared">pthread_rwlockattr_getpshared</code></a>()
+ function is used to get the process shared setting of a read/write lock
+ attribute object. The setting is returned via <var class="Fa">pshared</var>,
+ and may be one of two values:</p>
+<dl class="Bl-tag">
+ <dt id="PTHREAD_PROCESS_SHARED"><a class="permalink" href="#PTHREAD_PROCESS_SHARED"><code class="Dv">PTHREAD_PROCESS_SHARED</code></a></dt>
+ <dd>Any thread of any process that has access to the memory where the
+ read/write lock resides can manipulate the lock.</dd>
+ <dt id="PTHREAD_PROCESS_PRIVATE"><a class="permalink" href="#PTHREAD_PROCESS_PRIVATE"><code class="Dv">PTHREAD_PROCESS_PRIVATE</code></a></dt>
+ <dd>Only threads created within the same process as the thread that
+ initialized the read/write lock can manipulate the lock. This is the
+ default value.</dd>
+</dl>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
+ VALUES</a></h1>
+<p class="Pp">If successful, the
+ <code class="Fn">pthread_rwlockattr_getpshared</code>() function will return
+ zero. Otherwise an error number will be returned to indicate the error.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1>
+<p class="Pp">The <code class="Fn">pthread_rwlockattr_getpshared</code>()
+ function may fail if:</p>
+<dl class="Bl-tag">
+ <dt id="EINVAL">[<a class="permalink" href="#EINVAL"><code class="Er">EINVAL</code></a>]</dt>
+ <dd>The value specified by <var class="Fa">attr</var> is invalid.</dd>
+</dl>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
+ ALSO</a></h1>
+<p class="Pp"><a class="Xr">pthread_rwlock_init(3)</a>,
+ <a class="Xr">pthread_rwlockattr_init(3)</a>,
+ <a class="Xr">pthread_rwlockattr_setpshared(3)</a></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="STANDARDS"><a class="permalink" href="#STANDARDS">STANDARDS</a></h1>
+<p class="Pp">The <code class="Fn">pthread_rwlockattr_getpshared</code>()
+ function is expected to conform to <span class="St">Version&#x00A0;2 of the
+ Single UNIX Specification (&#x201C;SUSv2&#x201D;)</span>.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
+<p class="Pp">The <code class="Fn">pthread_rwlockattr_getpshared</code>()
+ function first appeared in <span class="Ux">FreeBSD 3.0</span>.</p>
+</section>
+</div>
+<table class="foot">
+ <tr>
+ <td class="foot-date">August 17, 2018</td>
+ <td class="foot-os">FreeBSD 15.0</td>
+ </tr>
+</table>