te at destruction.</P>

<A NAME="sync"></A>
<H4><CODE>chain::sync</CODE></H4>
<PRE CLASS="broken_ie">    <SPAN CLASS="keyword">bool</SPAN> sync();</PRE>

<P>Invokes the function <A HREF='../functions/flush.html'><CODE>flush</CODE></A> on each Filter and Device in this chain, which must be complete. Returns <CODE>true</CODE> unless at least one of these components is <A HREF='../concepts/flushable.html'>Flushable</A> and <A HREF='../functions/flush.html'><CODE>flush</CODE></A> returns <CODE>false</CODE> when