to observe any side-effects made by the active call, with no additional synchronization.
    <a href="https://github.com/planetis-m/sync/tree/master/sync/once.nim#L53" class="link-seesrc" target="_blank">Source</a>&nbsp;&nbsp;
<a href="https://github.com/planetis-m/sync/edit/master/sync/once.nim#L53" class="link-seesrc" target="_blank" >Edit</a>&nbsp;&nbsp;

  </dd>
</div>

  </dl>
</div>
<div class="section" id="12">
  <h1><a class="toc-backref" href="#12">Procs</a></h1>
  <dl class="item">
    <div id="=c