title: Detecting when ChucK child shred has finished
body: <p>Is it possible to determine when a ChucK child shred has finished executing if you have a reference to the child shred?  For example, in this code:</p>
  
  <pre><code>// define function go()
  fun void go()
  {
      // insert code
  }
  
  // spork another, store reference to new shred in offspring
  spork ~ go() =&gt; Shred @ offspring;
  </code></pre>
  
  <p>Is it possible to determine when <code>offspring</code> is done executing?</p>