1<?xml version="1.0" encoding="utf-8" ?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 4<head> 5<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 6<meta name="generator" content="Docutils 0.6: http://docutils.sourceforge.net/" /> 7<title>Parallel BGL Concept Global Descriptor</title> 8<link rel="stylesheet" href="../../../../rst.css" type="text/css" /> 9</head> 10<body> 11<div class="document" id="logo-concept-global-descriptor"> 12<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> 13 14<!-- Copyright (C) 2004-2008 The Trustees of Indiana University. 15Use, modification and distribution is subject to the Boost Software 16License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 17http://www.boost.org/LICENSE_1_0.txt) --> 18<div class="contents topic" id="contents"> 19<p class="topic-title first">Contents</p> 20<ul class="simple"> 21<li><a class="reference internal" href="#description" id="id1">Description</a></li> 22<li><a class="reference internal" href="#refinement-of" id="id2">Refinement of</a></li> 23<li><a class="reference internal" href="#notation" id="id3">Notation</a></li> 24<li><a class="reference internal" href="#associated-types" id="id4">Associated types</a></li> 25<li><a class="reference internal" href="#valid-expressions" id="id5">Valid Expressions</a></li> 26</ul> 27</div> 28<div class="section" id="description"> 29<h1><a class="toc-backref" href="#id1">Description</a></h1> 30<p>A global descriptor is an object that represents an entity that is 31owned by some process and may reside in an address space not 32accessible to the currently-executing process. The global descriptor 33consists of two parts: the <em>owner</em> of the entity, which is the 34identifier of that process in which the entity resides, and a <em>local 35descriptor</em>, that uniquely identifies the entity with the address 36space of the owner.</p> 37</div> 38<div class="section" id="refinement-of"> 39<h1><a class="toc-backref" href="#id2">Refinement of</a></h1> 40<blockquote> 41<ul class="simple"> 42<li><a class="reference external" href="http://www.sgi.com/tech/stl/DefaultConstructible.html">Default Constructible</a></li> 43<li><a class="reference external" href="http://www.sgi.com/tech/stl/Assignable.html">Assignable</a></li> 44</ul> 45</blockquote> 46</div> 47<div class="section" id="notation"> 48<h1><a class="toc-backref" href="#id3">Notation</a></h1> 49<dl class="docutils"> 50<dt>X</dt> 51<dd>A type that models the Global Descriptor concept.</dd> 52<dt>x</dt> 53<dd>Object of type X</dd> 54</dl> 55</div> 56<div class="section" id="associated-types"> 57<h1><a class="toc-backref" href="#id4">Associated types</a></h1> 58<table border="1" class="docutils"> 59<colgroup> 60<col width="23%" /> 61<col width="29%" /> 62<col width="48%" /> 63</colgroup> 64<tbody valign="top"> 65<tr><td>Process ID type</td> 66<td><tt class="docutils literal"><span class="pre">process_id_type</span></tt></td> 67<td>Determined by the process group 68associated with type X.</td> 69</tr> 70<tr><td>Local descriptor 71type</td> 72<td><tt class="docutils literal"><span class="pre">local_type</span></tt></td> 73<td>Determined by the data structure 74the descriptor accesses. 75Must model <a class="reference external" href="http://www.sgi.com/tech/stl/EqualityComparable.html">Equality Comparable</a> 76and <a class="reference external" href="http://www.sgi.com/tech/stl/CopyConstructible.html">Copy Constructible</a>.</td> 77</tr> 78</tbody> 79</table> 80</div> 81<div class="section" id="valid-expressions"> 82<h1><a class="toc-backref" href="#id5">Valid Expressions</a></h1> 83<table border="1" class="docutils"> 84<colgroup> 85<col width="17%" /> 86<col width="22%" /> 87<col width="22%" /> 88<col width="39%" /> 89</colgroup> 90<thead valign="bottom"> 91<tr><th class="head">Name</th> 92<th class="head">Expression</th> 93<th class="head">Type</th> 94<th class="head">Semantics</th> 95</tr> 96</thead> 97<tbody valign="top"> 98<tr><td>Owner</td> 99<td><tt class="docutils literal"><span class="pre">owner(x)</span></tt></td> 100<td><tt class="docutils literal"><span class="pre">process_id_type</span></tt></td> 101<td>Returns the owner of <tt class="docutils literal"><span class="pre">x</span></tt>.</td> 102</tr> 103<tr><td>Local descriptor</td> 104<td><tt class="docutils literal"><span class="pre">local(x)</span></tt></td> 105<td><tt class="docutils literal"><span class="pre">local_type</span></tt></td> 106<td>Returns the local descriptor 107uniquely identifying <tt class="docutils literal"><span class="pre">x</span></tt>.</td> 108</tr> 109</tbody> 110</table> 111<hr class="docutils" /> 112<p>Copyright (C) 2005 The Trustees of Indiana University.</p> 113<p>Authors: Douglas Gregor and Andrew Lumsdaine</p> 114</div> 115</div> 116<div class="footer"> 117<hr class="footer" /> 118Generated on: 2009-05-31 00:22 UTC. 119Generated by <a class="reference external" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference external" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source. 120 121</div> 122</body> 123</html> 124
