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<h4 class="subsectionHead"><span class="titlemark">6.23 </span> <a
id="x63-1000006.23"></a>psb_get_boundary — Extract list of boundary elements</h4>
<pre class="verbatim" id="verbatim-56">
call psb_get_boundary(bndel, desc, info)
</pre>
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<dl class="description"><dt class="description">
<span
class="cmbx-10">Type:</span> </dt><dd
class="description">Asynchronous.
</dd><dt class="description">
<span
class="cmbx-10">On Entry</span> </dt><dd
class="description">
</dd><dt class="description">
<span
class="cmbx-10">desc</span> </dt><dd
class="description">the communication descriptor.<br
class="newline" />Scope:<span
class="cmbx-10">local</span>.<br
class="newline" />Type:<span
class="cmbx-10">required</span>.<br
class="newline" />Intent: <span
class="cmbx-10">in</span>.<br
class="newline" />Specified as: a structured data of type <a
href="userhtmlsu5.html#descdata"><span
class="cmtt-10">psb</span><span
class="cmtt-10">_desc</span><span
class="cmtt-10">_type</span></a>.</dd></dl>
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<dl class="description"><dt class="description">
<span
class="cmbx-10">On Return</span> </dt><dd
class="description">
</dd><dt class="description">
<span
class="cmbx-10">bndel</span> </dt><dd
class="description">The list of boundary elements on the calling process, in local numbering.<br
class="newline" />Scope: <span
class="cmbx-10">local </span><br
class="newline" />Type: <span
class="cmbx-10">required</span><br
class="newline" />Intent: <span
class="cmbx-10">out</span>.<br
class="newline" />Specified as: a rank one array with the ALLOCATABLE attribute, of type
integer.<br
class="newline" />
</dd><dt class="description">
<span
class="cmbx-10">info</span> </dt><dd
class="description">Error code.<br
class="newline" />Scope: <span
class="cmbx-10">local </span><br
class="newline" />Type: <span
class="cmbx-10">required </span><br
class="newline" />Intent: <span
class="cmbx-10">out</span>.<br
class="newline" />An integer value; 0 means no error has been detected.</dd></dl>
<!--l. 1594--><p class="noindent" ><span
class="cmbx-12">Notes</span>
<ol class="enumerate1" >
<li
class="enumerate" id="x63-100002x1">If there are no boundary elements (i.e., if the local part of the connectivity
graph is self-contained) the output vector is set to the “not allocated”
state.
</li>
<li
class="enumerate" id="x63-100004x2">Otherwise the size of <span class="obeylines-h"><span class="verb"><span
class="cmtt-10">bndel</span></span></span> will be exactly equal to the number of
boundary elements.</li></ol>
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