  <tr><td class="paramname">data</td><td>the item to send, its contents will be moved using the callback provided to <a class="el" href="../../da/d87/fftools__thread__queue_8h.html#a7c344c91be2c77f54a4b23a7fbe03497">tq_alloc()</a>; on failure the item will be left untouched </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd><ul>
<li>0 the item was successfully sent</li>
<li>AVERROR(ENOMEM) could not allocate an item for writing to the FIFO</li>
<li>AVERROR(EINVAL) the sending