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<span class="heading">SGI Standard Template Library</span>
<h3>Overview</h3>
<p class="FOOTNOTE"><i>Silicon Graphics has made its implementation of the C++
Standard Template Library freely available to the public. The SGI
Standard Template Library features thread safety, improved memory
utilization, improved run-time efficiency, and new data structures,
including hash tables; it also includes a comprehensive conceptual
taxonomy of generic software components.</i></p>
<p><font size="1">cite from SF BA <a href="http://www.centeradv.com">Center
for Advanced Technology</a> C++ ISG presentation</font></p>
Visit SGI <a href="http://www.sgi.com/Technology/STL">Standard
Template Library User's Guide</a> page to learn more about SGI STL. That
excellent site contain full STL documentation, distribution to download
and useful links.
<h3><a name="efficiency"></a>Efficiency</h3>
<p>These are major improvements that make SGI STL the most efficient:</p>
<ul>
<li><b>Rich set of algorithm specializations.</b> What everybody is
looking for in generic library, it's the <b>generic interface</b>,
not the <b>same code</b> for every type instantiated. Utilizing
<b>__type_traits</b> technique, SGI STL optimizes <b>copy(T*, T*, T*
)</b> call for <b>T</b> being builtin type into a single <b>memmove()</b>
call, and so on.</li>
<li><b>Node allocators.</b> SGI STL implements allocator<T> as a
wrapper over thread-safe node allocator engine which is
fine-tuned to handle allocation of relatively small chunks of memory
very efficiently.</li>
</ul>
<h3><b><a name="thread_safety"></a>Thread safety </b></h3>
<p>Please refer to SGI site for <a href="http://www.sgi.com/Technology/STL/thread_safety.html">detailed
document on thread safety</a>. Basic points are:</p>
<ul>
<li><b>simultaneous read access to the same container from within
separate threads is safe;</b></li>
<li><b>simultaneous access to distinct containers (not shared between
threads) is safe;</b></li>
<li><b>user must provide synchronization for all accesses if any
thread may modify shared container.</b></li>
</ul>
<h3><b>Exception safety</b></h3>
<p>SGI STL is exception-safe. STLport <a href="exception_safety.html">document
on exception safety</a> describes STL guarantees and client requirements.</p>
<h3><b>Standard compliance</b></h3>
<p>SGI STL is committed to close compliance to C++ Standard. With the
latest release in Feb 99 and experimental effort continued through 2000,
it incorporates the latest "word of the standard".</p>
<h3><b>Reliability</b></h3>
<p>SGI STL is being shipped with GNU C++ since 2.8.x.<br>
That is enormous amount of installations which provide solid feedback to
get bugs fixed.</p>
<h3><b>Important extensions</b></h3>
<p>SGI STL provides the following extensions compared to the C++
standard:</p>
<ul>
<li><b>hashed containers:</b> hash_set, hash_multiset, hash_map,
hash_multimap.</li>
<li><b>single-linked lists</b> - often very reasonable tradeoff.</li>
<li><b>ropes:</b> alternative representation of strings which scale
well to very large strings</li>
</ul>
<h3>Public distribution</h3>
<p>SGI STL is being distributed free of charge and restrictions:</p>
<p><b><i>Copyright (c) 1994 Hewlett-Packard Company</i></b></p>
<p><b><i>Copyright (c) 1996,97 Silicon Graphics Computer Systems, Inc.</i></b></p>
<p><i><font size="2">Permission to use, copy, modify, distribute and
sell this software and its documentation for any purpose is hereby
granted without fee, provided that the above copyright notice appear in
all copies and that both that copyright notice and this permission
notice appear in supporting documentation. Hewlett-Packard Company makes
no representations about the suitability of this software for any
purpose. It is provided "as is" without express or implied
warranty.</font></i></p>
<p><i><font size="2">Permission to use, copy, modify, distribute and
sell this software and its documentation for any purpose is hereby
granted without fee, provided that the above copyright notice appear in
all copies and that both that copyright notice and this permission
notice appear in supporting documentation. Silicon Graphics makes no
representations about the suitability of this software for any purpose.
It is provided "as is" without express or implied warranty.</font></i>
</p>
</td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/trans.gif" border="0" height="20" width="50"><br><a href="index.html">Table of Contents</a><br></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/trans.gif" border="0" height="40" width="80"><br><img src="images/black.gif" border="0" height="1" width="776"></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/black.gif" border="0" height="1" width="776"></td></tr><tr valign="top" align="left"><td width="24"><img src="images/trans.gif" border="0" height="1" width="24"></td><td width="776"><img src="images/trans.gif" border="0" height="5" width="50"><br><span class="copyright">Copyright 2001 by STLport</span><br><img src="images/trans.gif" border="0" height="50" width="80"></td></tr></table></body></html>⌨️ 快捷键说明
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