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  27 <a name="boost_asio.reference.basic_waitable_timer.basic_waitable_timer.overload1"></a><a class="link" href="overload1.html" title="basic_waitable_timer::basic_waitable_timer (1 of 3 overloads)">basic_waitable_timer::basic_waitable_timer
  28           (1 of 3 overloads)</a>
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  30 <p>
  31             Constructor.
  32           </p>
  33 <pre class="programlisting"><span class="identifier">basic_waitable_timer</span><span class="special">(</span>
  34     <span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span> <span class="special">&amp;</span> <span class="identifier">io_service</span><span class="special">);</span>
  35 </pre>
  36 <p>
  37             This constructor creates a timer without setting an expiry time. The
  38             <code class="computeroutput"><span class="identifier">expires_at</span><span class="special">()</span></code>
  39             or <code class="computeroutput"><span class="identifier">expires_from_now</span><span class="special">()</span></code>
  40             functions must be called to set an expiry time before the timer can be
  41             waited on.
  42           </p>
  43 <h6>
  44 <a name="boost_asio.reference.basic_waitable_timer.basic_waitable_timer.overload1.h0"></a>
  45             <span class="phrase"><a name="boost_asio.reference.basic_waitable_timer.basic_waitable_timer.overload1.parameters"></a></span><a class="link" href="overload1.html#boost_asio.reference.basic_waitable_timer.basic_waitable_timer.overload1.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">io_service</span></dt>
  51 <dd><p>
  52                   The <a class="link" href="../../io_service.html" title="io_service"><code class="computeroutput"><span class="identifier">io_service</span></code></a> object that
  53                   the timer will use to dispatch handlers for any asynchronous operations
  54                   performed on the timer.
  55                 </p></dd>
  56 </dl>
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