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  27 <a name="boost_asio.reference.windows__basic_object_handle.async_wait"></a><a class="link" href="async_wait.html" title="windows::basic_object_handle::async_wait">windows::basic_object_handle::async_wait</a>
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  29 <p>
  30           <a class="indexterm" name="boost_asio.indexterm.windows__basic_object_handle.async_wait"></a>
  31 Start
  32           an asynchronous wait on the object handle.
  33         </p>
  34 <pre class="programlisting">template&lt;
  35     typename <a class="link" href="../WaitHandler.html" title="Wait handler requirements">WaitHandler</a> = <a class="link" href="../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>&gt;
  36 <a class="link" href="../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> async_wait(
  37     WaitHandler &amp;&amp; handler = <a class="link" href="../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>);
  38 </pre>
  39 <p>
  40           This function is be used to initiate an asynchronous wait against the object
  41           handle. It always returns immediately.
  42         </p>
  43 <h6>
  44 <a name="boost_asio.reference.windows__basic_object_handle.async_wait.h0"></a>
  45           <span class="phrase"><a name="boost_asio.reference.windows__basic_object_handle.async_wait.parameters"></a></span><a class="link" href="async_wait.html#boost_asio.reference.windows__basic_object_handle.async_wait.parameters">Parameters</a>
  46         </h6>
  47 <div class="variablelist">
  48 <p class="title"><b></b></p>
  49 <dl class="variablelist">
  50 <dt><span class="term">handler</span></dt>
  51 <dd>
  52 <p>
  53                 The handler to be called when the object handle is set to the signalled
  54                 state. Copies will be made of the handler as required. The function
  55                 signature of the handler must be:
  56 </p>
  57 <pre class="programlisting">void handler(
  58   const boost::system::error_code&amp; error // Result of operation.
  59 );
  60 </pre>
  61 <p>
  62                 Regardless of whether the asynchronous operation completes immediately
  63                 or not, the handler will not be invoked from within this function.
  64                 On immediate completion, invocation of the handler will be performed
  65                 in a manner equivalent to using <a class="link" href="../post.html" title="post"><code class="computeroutput">post</code></a>.
  66               </p>
  67 </dd>
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  73 <td align="right"><div class="copyright-footer">Copyright &#169; 2003-2019 Christopher M. Kohlhoff<p>
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