e called when all the jobs before</span></div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>    <span class="comment">// this point are done.</span></div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>    T&amp; callback(<span class="keyword">const</span> std::function&lt;<span class="keywordtype">void</span>(::cudaStream_t, ::cudaError)&gt;&amp; callback);</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="linen