apped I/O functions.
      </p>
<h5>
<a name="boost_asio.reference.windows__overlapped_ptr.h1"></a>
        <span class="phrase"><a name="boost_asio.reference.windows__overlapped_ptr.thread_safety"></a></span><a class="link" href="windows__overlapped_ptr.html#boost_asio.reference.windows__overlapped_ptr.thread_safety">Thread
        Safety</a>
      </h5>
<p>
        <span class="emphasis"><em>Distinct</em></span> <span class="emphasis"><em>objects:</em></span> Safe.
      </p>
<p>
        <span class="emph