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<title>Rings: Multiple Lua States</title>
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<div id="product_name"><big><strong>Rings</strong></big></div>
<div id="product_description">Multiple Lua States</div>
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<h1>Rings</h1>
<ul>
<li><strong>Home</strong>
<ul>
<li><a href="index.html#overview">Overview</a></li>
<li><a href="index.html#status">Status</a></li>
<li><a href="index.html#download">Download</a></li>
<li><a href="index.html#history">History</a></li>
<li><a href="index.html#credits">Credits</a></li>
<li><a href="index.html#contact">Contact us</a></li>
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<li><a href="manual.html#building">Building</a></li>
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<li><a href="manual.html#reference">Reference</a>
<ul>
<li><a href="manual.html#master_functions">Master functions</a></li>
<li><a href="manual.html#slave_functions">Slave functions</a></li>
<li><a href="manual.html#stable">Stable</a></li>
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<li><a href="manual.html#examples">Examples</a></li>
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<li><a href="http://luaforge.net/projects/rings/">Project</a>
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<li><a href="http://luaforge.net/tracker/?group_id=147">Bug Tracker</a></li>
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<h2><a name="overview"></a>Overview</h2>
<p>Rings is a library which provides a way to create new Lua states from within
Lua. It also offers a simple way to communicate between the creator (master) and
the created (slave) states.</p>
<p>Rings is free software and uses the same <a href="license.html">license</a>
as Lua 5.1.</p>
<h2><a name="status"></a>Status</h2>
<p>
Rings version 1.2.2 is now available for <a href="#download">download</a>.</p>
<h2><a name="download"></a>Download</h2>
<p>Rings can be downloaded in source code from its
<a href="http://luaforge.net/projects/rings/files">LuaForge</a>
page. If you are using
<a href="http://luaforge.net/projects/luabinaries/">LuaBinaries</a> 5.1.3,
a Windows precompiled version of Rings (compiled with Visual Studio 2005 Express)
can also be found at the same LuaForge page.</p>
<h2><a name="history"></a>History</h2>
<dl class="history">
<dt><strong>Version 1.2.2</strong> [30/Jun/2008]</dt>
<dd><ul>
<li>Fixed a stack handling issue (bug report and patch by Shmuel Zeigerman)</li>
</ul></dd>
<dt><strong>Version 1.2.1</strong> [8/May/2008]</dt>
<dd><ul>
<li>Fixed bug [<a href="http://luaforge.net/tracker/?func=detail&amp;group_id=147&amp;aid=2074&amp;atid=680">#2074</a>] -
Rings uses the deprecated function luaL_openlib (patch by Ignacio Burgue&ntilde;o)</li>
</ul></dd>
<dt><strong>Version 1.2</strong> [18/Feb/2008]</dt>
<dd>
<ul>
<li><a href="manual.html#rings_new"><code>rings.new</code></a> now takes
an optional environment to be used by
<a href="manual.html#rings_remotedostring"><code>remotedostring</code></a>.
If the environment is nil, it defaults to <code>_M or _G</code>.</li>
<li>Fixed a bug with interaction of rings and coroutines, rings was assuming a 1:1 mapping
between lua_States and rings master and slave states, which is not true when coroutines/threads are involved.
(bug found by Ignacio Burgue&ntilde;o)</li>
</ul>
</dd>
<dt><strong><a href="http://www.keplerproject.org/rings/1.1">Version 1.1</a></strong> [11/Jun/2007]</dt>
<dd>Adapted to work with Lua 5.1.</dd>
<dt><strong><a href="http://www.keplerproject.org/rings/1.0">Version 1.0</a></strong> [10/Mar/2006]</dt>
<dd>First public version, works with Lua 5.0.</dd>
</dl>
<h2><a name="credits"></a>Credits</h2>
<p>Rings was designed by Roberto Ierusalimschy and Tom&aacute;s Guisasola
as part of the <a href="http://www.keplerproject.org">Kepler Project</a>.
The implementation was coded by Tom&aacute;s Guisasola.</p>
<p>Rings development was sponsored by
<a href="http://www.fabricadigital.com.br">F&aacute;brica Digital</a>.</p>
<h2><a name="contact"></a>Contact us</h2>
<p>For more information please
<a href="mailto:info-NO-SPAM-THANKS@keplerproject.org">contact us</a>.
Comments are welcome!</p>
<p>You can also reach other Kepler developers and users on the Kepler Project
<a href="http://luaforge.net/mail/?group_id=104">mailing list</a>.</p>
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