83 lines
4.5 KiB
HTML
83 lines
4.5 KiB
HTML
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<title>post (1 of 3 overloads)</title>
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<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
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<div class="section">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="asio.reference.post.overload1"></a><a class="link" href="overload1.html" title="post (1 of 3 overloads)">post (1 of 3 overloads)</a>
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</h4></div></div></div>
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<p>
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Submits a completion token or function object for execution.
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</p>
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<pre class="programlisting">template<
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typename CompletionToken>
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<a class="link" href="../asynchronous_operations.html#asio.reference.asynchronous_operations.automatic_deduction_of_initiating_function_return_type"><span class="emphasis"><em>DEDUCED</em></span></a> post(
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CompletionToken && token);
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</pre>
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<p>
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This function submits an object for execution using the object's associated
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executor. The function object is queued for execution, and is never called
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from the current thread prior to returning from <code class="computeroutput">post()</code>.
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</p>
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<p>
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The use of <code class="computeroutput">post()</code>, rather than <a class="link" href="../defer.html" title="defer"><code class="computeroutput">defer</code></a>
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, indicates the caller's preference that the function object be eagerly
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queued for execution.
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</p>
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<p>
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This function has the following effects:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem">
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Constructs a function object handler of type <code class="computeroutput">Handler</code>,
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initialized with <code class="computeroutput">handler(forward<CompletionToken>(token))</code>.
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</li>
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<li class="listitem">
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Constructs an object <code class="computeroutput">result</code> of type <code class="computeroutput">async_result<Handler></code>,
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initializing the object as <code class="computeroutput">result(handler)</code>.
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</li>
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<li class="listitem">
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Obtains the handler's associated executor object <code class="computeroutput">ex</code> by
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performing <code class="computeroutput">get_associated_executor(handler)</code>.
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</li>
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<li class="listitem">
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Obtains the handler's associated allocator object <code class="computeroutput">alloc</code>
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by performing <code class="computeroutput">get_associated_allocator(handler)</code>.
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</li>
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<li class="listitem">
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Performs <code class="computeroutput">ex.post(std::move(handler), alloc)</code>.
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</li>
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<li class="listitem">
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Returns <code class="computeroutput">result.get()</code>.
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</li>
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</ul></div>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M.
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Kohlhoff<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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</p>
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</div></td>
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