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- <title>Parallel BGL Concept Global Descriptor</title>
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- <div class="document" id="logo-concept-global-descriptor">
- <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.
- Use, modification and distribution is subject to the Boost Software
- License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- http://www.boost.org/LICENSE_1_0.txt) -->
- <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>
- </div>
- </div>
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