ose bytes were not accompanied by any native handle. It shall also be thus set if 0 is returned (indicating error including would-block and fatal errors). </td></tr>
    <tr><td class="paramname">target_payload_blob</td><td>The buffer into which to write received blob data, namely up to <code>target_payload_blob-&gt;size()</code> bytes. If null, or the size is not positive, behiavor is undefined (assertion may trip). Reiterating the above outcome semantics: Either there is no error, and then the <code>N</co