title: Qt 4.5 - Is emitting signal a function call, or a thread, and does it blocks?
body: <p>I am not sure about the nature of the signal/slot mechanism in Qt 4.5. When a signal is emitted, is it a blocking function call or a thread? Say this</p>
  
  <pre><code>emit GrabLatestData();
  
  // proceed with latest data
  </code></pre>
  
  <p>Will all the signal/slot chain be resolved before proceeding to the next line?</p>