d</span>* userdata)</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span>    {</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span>        <span class="keyword">auto</span> callback =</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>            <span class="keyword">reinterpret_cast&lt;</span>std::function&lt;<span class="keywordtype">void</span>(cudaStream_t, cudaError)<span class="keyword">&