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<a name="asio.reference.basic_datagram_socket.async_send_to.overload2"></a><a class="link" href="overload2.html" title="basic_datagram_socket::async_send_to (2 of 2 overloads)">basic_datagram_socket::async_send_to
(2 of 2 overloads)</a>
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<p>
Start an asynchronous send.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="../../ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="../../WriteHandler.html" title="Write handler requirements">WriteHandler</a><span class="special">></span>
<span class="keyword">void</span> <span class="identifier">async_send_to</span><span class="special">(</span>
<span class="keyword">const</span> <span class="identifier">ConstBufferSequence</span> <span class="special">&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="keyword">const</span> <span class="identifier">endpoint_type</span> <span class="special">&</span> <span class="identifier">destination</span><span class="special">,</span>
<span class="identifier">socket_base</span><span class="special">::</span><span class="identifier">message_flags</span> <span class="identifier">flags</span><span class="special">,</span>
<span class="identifier">WriteHandler</span> <span class="identifier">handler</span><span class="special">);</span>
</pre>
<p>
This function is used to asynchronously send a datagram to the specified
remote endpoint. The function call always returns immediately.
</p>
<a name="asio.reference.basic_datagram_socket.async_send_to.overload2.parameters"></a><h6>
<a name="id751070"></a>
<a class="link" href="overload2.html#asio.reference.basic_datagram_socket.async_send_to.overload2.parameters">Parameters</a>
</h6>
<div class="variablelist">
<p class="title"><b></b></p>
<dl>
<dt><span class="term">buffers</span></dt>
<dd><p>
One or more data buffers to be sent to the remote endpoint. Although
the buffers object may be copied as necessary, ownership of the
underlying memory blocks is retained by the caller, which must
guarantee that they remain valid until the handler is called.
</p></dd>
<dt><span class="term">flags</span></dt>
<dd><p>
Flags specifying how the send call is to be made.
</p></dd>
<dt><span class="term">destination</span></dt>
<dd><p>
The remote endpoint to which the data will be sent. Copies will
be made of the endpoint as required.
</p></dd>
<dt><span class="term">handler</span></dt>
<dd>
<p>
The handler to be called when the send operation completes. Copies
will be made of the handler as required. The function signature
of the handler must be:
</p>
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">handler</span><span class="special">(</span>
<span class="keyword">const</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&</span> <span class="identifier">error</span><span class="special">,</span> <span class="comment">// Result of operation.
</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">bytes_transferred</span> <span class="comment">// Number of bytes sent.
</span><span class="special">);</span>
</pre>
<p>
Regardless of whether the asynchronous operation completes immediately
or not, the handler will not be invoked from within this function.
Invocation of the handler will be performed in a manner equivalent
to using <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">::</span><span class="identifier">post</span><span class="special">()</span></code>.
</p>
</dd>
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<td align="right"><div class="copyright-footer">Copyright © 2003 - 2010 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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