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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_asio.reference.ObjectHandleService"></a><a class="link" href="ObjectHandleService.html" title="Object handle service requirements">Object handle |
| service requirements</a> |
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| <p> |
| An object handle service must meet the requirements for a <a class="link" href="HandleService.html" title="Handle service requirements">handle |
| service</a>, as well as the additional requirements listed below. |
| </p> |
| <p> |
| In the table below, <code class="computeroutput"><span class="identifier">X</span></code> denotes |
| an object handle service class, <code class="computeroutput"><span class="identifier">a</span></code> |
| denotes a value of type <code class="computeroutput"><span class="identifier">X</span></code>, |
| <code class="computeroutput"><span class="identifier">b</span></code> denotes a value of type |
| <code class="computeroutput"><span class="identifier">X</span><span class="special">::</span><span class="identifier">implementation_type</span></code>, <code class="computeroutput"><span class="identifier">ec</span></code> |
| denotes a value of type <code class="computeroutput"><span class="identifier">error_code</span></code>, |
| and <code class="computeroutput"><span class="identifier">wh</span></code> denotes a value meeting |
| <a class="link" href="WaitHandler.html" title="Wait handler requirements"><code class="computeroutput"><span class="identifier">WaitHandler</span></code></a> |
| requirements. |
| </p> |
| <div class="table"> |
| <a name="boost_asio.reference.ObjectHandleService.t0"></a><p class="title"><b>Table 19. ObjectHandleService requirements</b></p> |
| <div class="table-contents"><table class="table" summary="ObjectHandleService requirements"> |
| <colgroup> |
| <col> |
| <col> |
| <col> |
| </colgroup> |
| <thead><tr> |
| <th> |
| <p> |
| expression |
| </p> |
| </th> |
| <th> |
| <p> |
| return type |
| </p> |
| </th> |
| <th> |
| <p> |
| assertion/note<br> pre/post-condition |
| </p> |
| </th> |
| </tr></thead> |
| <tbody> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">wait</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> |
| <span class="identifier">ec</span><span class="special">);</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">error_code</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.<br> |
| <br> Synchronously waits for the object represented by handle |
| <code class="computeroutput"><span class="identifier">b</span></code> to become signalled. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">async_wait</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> |
| <span class="identifier">wh</span><span class="special">);</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="keyword">void</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.<br> |
| <br> Initiates an asynchronous operation to wait for the object |
| represented by handle <code class="computeroutput"><span class="identifier">b</span></code> |
| to become signalled. The operation is performed via the <code class="computeroutput"><span class="identifier">io_service</span></code> object <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">get_io_service</span><span class="special">()</span></code> |
| and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous |
| operation</a> requirements. |
| </p> |
| </td> |
| </tr> |
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| <td align="right"><div class="copyright-footer">Copyright © 2003-2015 Christopher M. |
| Kohlhoff<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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