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      Lock</b></font></td>
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<h2>scoped_lock_d</h2>
<p>The <tt>scoped_lock_d</tt> directive constructs a parser that locks a mutex
  during the attempt to match the contained parser.</p>
<p>Syntax:</p>
<pre>    <span class="identifier">scoped_lock_d</span><span class="special">(</span>mutex<span class="special">&amp;)[</span>body-parser<span class="special">]</span></pre>
<p>Note, that nesting <tt>scoped_lock_d</tt> directives bears the risk of deadlocks
  since the order of locking depends on the grammar used and may even depend on
  the input being parsed. Locking order has to be consistent within an application
  to ensure deadlock free operation.</p>
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<p class="copyright">Copyright &copy; 2003 Martin Wille<br>
  <br>
  <font size="2">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)</font></p>
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