title: What does explicitly shared mean?
body: <p>In this page:</p>
  
  <p><a href="http://qwt.sourceforge.net/class_qwt_plot_curve.html#afd13c94e23520dacbc37b4d0fd036a8b" rel="nofollow">http://qwt.sourceforge.net/class_qwt_plot_curve.html#afd13c94e23520dacbc37b4d0fd036a8b</a></p>
  
  <p>The method</p>
  
  <pre><code>void QwtPlotCurve::setRawSamples()
  </code></pre>
  
  <p>just saves the addresses of the data in the QwtPlotCurve, which is exactly what I want for efficiency.</p>
  
  <p>While: </p>
  
  <pre><code>void QwtPlotCurve::setSamples()
  </code></pre>
  
  <p>uses QVector, which is more convenient. But it's only "explicitly shared". What does that mean? does save the pointer just like the first one?</p>
  
  <p>I need to add a point to the plot each 50 ms. Deep-copying of data isn't the best solution!!! advice?</p>