100 lines
4.5 KiB
HTML
100 lines
4.5 KiB
HTML
<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>io_context::strand::wrap</title>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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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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<a accesskey="p" href="strand.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../io_context__strand.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="_strand.html"><img src="../../../next.png" alt="Next"></a>
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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.io_context__strand.wrap"></a><a class="link" href="wrap.html" title="io_context::strand::wrap">io_context::strand::wrap</a>
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</h4></div></div></div>
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<p>
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<a class="indexterm" name="asio.indexterm.io_context__strand.wrap"></a>
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(Deprecated:
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Use <a class="link" href="../bind_executor.html" title="bind_executor"><code class="computeroutput">bind_executor</code></a>.)
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Create a new handler that automatically dispatches the wrapped handler
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on the strand.
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</p>
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<pre class="programlisting">template<
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typename <a class="link" href="../Handler.html" title="Handlers">Handler</a>>
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unspecified wrap(
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Handler handler);
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</pre>
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<p>
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This function is used to create a new handler function object that, when
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invoked, will automatically pass the wrapped handler to the strand's dispatch
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function.
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</p>
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<h6>
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<a name="asio.reference.io_context__strand.wrap.h0"></a>
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<span><a name="asio.reference.io_context__strand.wrap.parameters"></a></span><a class="link" href="wrap.html#asio.reference.io_context__strand.wrap.parameters">Parameters</a>
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</h6>
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<div class="variablelist">
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<p class="title"><b></b></p>
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<dl>
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<dt><span class="term">handler</span></dt>
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<dd>
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<p>
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The handler to be wrapped. The strand will make a copy of the handler
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object as required. The function signature of the handler must be:
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</p>
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<pre class="programlisting">void handler(A1 a1, ... An an);
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</pre>
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<p>
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</p>
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</dd>
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</dl>
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</div>
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<h6>
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<a name="asio.reference.io_context__strand.wrap.h1"></a>
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<span><a name="asio.reference.io_context__strand.wrap.return_value"></a></span><a class="link" href="wrap.html#asio.reference.io_context__strand.wrap.return_value">Return Value</a>
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</h6>
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<p>
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A function object that, when invoked, passes the wrapped handler to the
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strand's dispatch function. Given a function object with the signature:
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</p>
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<pre class="programlisting">R f(A1 a1, ... An an);
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</pre>
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<p>
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If this function object is passed to the wrap function like so:
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</p>
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<pre class="programlisting">strand.wrap(f);
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</pre>
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<p>
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then the return value is a function object with the signature
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</p>
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<pre class="programlisting">void g(A1 a1, ... An an);
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</pre>
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<p>
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that, when invoked, executes code equivalent to:
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</p>
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<pre class="programlisting">strand.dispatch(boost::bind(f, a1, ... an));
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</pre>
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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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</tr></table>
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