an><span class="identifier">lexical_cast</span><span class="special">&lt;</span> <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="special">&gt;(</span><span class="identifier">param</span><span class="special">.</span><span class="identifier">get</span><span class="special">());</span>
            <span class="identifier">write_interval</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">posix_t