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<title>Parallel BGL Concept Global Descriptor</title>
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<h1 class="title"><a class="reference external" href="http://www.osl.iu.edu/research/pbgl"><img align="middle" alt="Parallel BGL" class="align-middle" src="pbgl-logo.png" /></a> Concept Global Descriptor</h1>

<!-- Copyright (C) 2004-2008 The Trustees of Indiana University.
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<div class="contents topic" id="contents">
<p class="topic-title first">Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#description" id="id1">Description</a></li>
<li><a class="reference internal" href="#refinement-of" id="id2">Refinement of</a></li>
<li><a class="reference internal" href="#notation" id="id3">Notation</a></li>
<li><a class="reference internal" href="#associated-types" id="id4">Associated types</a></li>
<li><a class="reference internal" href="#valid-expressions" id="id5">Valid Expressions</a></li>
</ul>
</div>
<div class="section" id="description">
<h1><a class="toc-backref" href="#id1">Description</a></h1>
<p>A global descriptor is an object that represents an entity that is
owned by some process and may reside in an address space not
accessible to the currently-executing process. The global descriptor
consists of two parts: the <em>owner</em> of the entity, which is the
identifier of that process in which the entity resides, and a <em>local
descriptor</em>, that uniquely identifies the entity with the address
space of the owner.</p>
</div>
<div class="section" id="refinement-of">
<h1><a class="toc-backref" href="#id2">Refinement of</a></h1>
<blockquote>
<ul class="simple">
<li><a class="reference external" href="http://www.sgi.com/tech/stl/DefaultConstructible.html">Default Constructible</a></li>
<li><a class="reference external" href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a></li>
</ul>
</blockquote>
</div>
<div class="section" id="notation">
<h1><a class="toc-backref" href="#id3">Notation</a></h1>
<dl class="docutils">
<dt>X</dt>
<dd>A type that models the Global Descriptor concept.</dd>
<dt>x</dt>
<dd>Object of type X</dd>
</dl>
</div>
<div class="section" id="associated-types">
<h1><a class="toc-backref" href="#id4">Associated types</a></h1>
<table border="1" class="docutils">
<colgroup>
<col width="23%" />
<col width="29%" />
<col width="48%" />
</colgroup>
<tbody valign="top">
<tr><td>Process ID type</td>
<td><tt class="docutils literal"><span class="pre">process_id_type</span></tt></td>
<td>Determined by the process group
associated with type X.</td>
</tr>
<tr><td>Local descriptor
type</td>
<td><tt class="docutils literal"><span class="pre">local_type</span></tt></td>
<td>Determined by the data structure
the descriptor accesses.
Must model <a class="reference external" href="http://www.sgi.com/tech/stl/EqualityComparable.html">Equality Comparable</a>
and <a class="reference external" href="http://www.sgi.com/tech/stl/CopyConstructible.html">Copy Constructible</a>.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="valid-expressions">
<h1><a class="toc-backref" href="#id5">Valid Expressions</a></h1>
<table border="1" class="docutils">
<colgroup>
<col width="17%" />
<col width="22%" />
<col width="22%" />
<col width="39%" />
</colgroup>
<thead valign="bottom">
<tr><th class="head">Name</th>
<th class="head">Expression</th>
<th class="head">Type</th>
<th class="head">Semantics</th>
</tr>
</thead>
<tbody valign="top">
<tr><td>Owner</td>
<td><tt class="docutils literal"><span class="pre">owner(x)</span></tt></td>
<td><tt class="docutils literal"><span class="pre">process_id_type</span></tt></td>
<td>Returns the owner of <tt class="docutils literal"><span class="pre">x</span></tt>.</td>
</tr>
<tr><td>Local descriptor</td>
<td><tt class="docutils literal"><span class="pre">local(x)</span></tt></td>
<td><tt class="docutils literal"><span class="pre">local_type</span></tt></td>
<td>Returns the local descriptor
uniquely identifying <tt class="docutils literal"><span class="pre">x</span></tt>.</td>
</tr>
</tbody>
</table>
<hr class="docutils" />
<p>Copyright (C) 2005 The Trustees of Indiana University.</p>
<p>Authors: Douglas Gregor and Andrew Lumsdaine</p>
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Generated on: 2009-05-31 00:22 UTC.
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