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   <h4 class="subsectionHead"><span class="titlemark">6.23   </span> <a 
 id="x63-1000006.23"></a>psb_get_boundary &#8212; Extract list of boundary elements</h4>
                                                                  

                                                                  
   <pre class="verbatim" id="verbatim-56">
call&#x00A0;psb_get_boundary(bndel,&#x00A0;desc,&#x00A0;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 &#8220;not allocated&#8221;
     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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