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97 lines
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<div class="titlepage"><div><div><h4 class="title">
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<a name="boost_asio.reference.dispatch.overload2"></a><a class="link" href="overload2.html" title="dispatch (2 of 3 overloads)">dispatch (2
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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 <a class="link" href="../Executor1.html" title="Executor requirements">Executor</a>,
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typename CompletionToken = <a class="link" href="../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>>
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<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> dispatch(
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const Executor & ex,
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CompletionToken && token = <a class="link" href="../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>,
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typename constraint< execution::is_executor< Executor >::value||is_executor< Executor >::value >::type = 0);
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</pre>
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<p>
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This function submits an object for execution using the specified executor.
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The function object may be called from the current thread prior to returning
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from <code class="computeroutput">dispatch()</code>. Otherwise, it is 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" style="list-style-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">ex1</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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Creates a work object <code class="computeroutput">w</code> by performing <code class="computeroutput">make_work(ex1)</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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Constructs a function object <code class="computeroutput">f</code> with a function call operator
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that performs <code class="computeroutput">ex1.dispatch(std::move(handler), alloc)</code>
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followed by <code class="computeroutput">w.reset()</code>.
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</li>
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<li class="listitem">
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Performs <code class="computeroutput">Executor(ex).dispatch(std::move(f), 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 © 2003-2021 Christopher
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M. 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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