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  27 <a name="boost_asio.reference.basic_raw_socket.async_send.overload1"></a><a class="link" href="overload1.html" title="basic_raw_socket::async_send (1 of 2 overloads)">basic_raw_socket::async_send
  28           (1 of 2 overloads)</a>
  29 </h5></div></div></div>
  30 <p>
  31             Start an asynchronous send on a connected socket.
  32           </p>
  33 <pre class="programlisting">template&lt;
  34     typename <a class="link" href="../../ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>,
  35     typename <a class="link" href="../../WriteHandler.html" title="Write handler requirements">WriteHandler</a> = <a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>&gt;
  36 <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> async_send(
  37     const ConstBufferSequence &amp; buffers,
  38     WriteHandler &amp;&amp; handler = <a class="link" href="../../asynchronous_operations.html#boost_asio.reference.asynchronous_operations.default_completion_tokens"><span class="emphasis"><em>DEFAULT</em></span></a>);
  39 </pre>
  40 <p>
  41             This function is used to send data on the raw socket. The function call
  42             will block until the data has been sent successfully or an error occurs.
  43           </p>
  44 <h6>
  45 <a name="boost_asio.reference.basic_raw_socket.async_send.overload1.h0"></a>
  46             <span class="phrase"><a name="boost_asio.reference.basic_raw_socket.async_send.overload1.parameters"></a></span><a class="link" href="overload1.html#boost_asio.reference.basic_raw_socket.async_send.overload1.parameters">Parameters</a>
  47           </h6>
  48 <div class="variablelist">
  49 <p class="title"><b></b></p>
  50 <dl class="variablelist">
  51 <dt><span class="term">buffers</span></dt>
  52 <dd><p>
  53                   One or more data buffers to be sent on the socket. Although the
  54                   buffers object may be copied as necessary, ownership of the underlying
  55                   memory blocks is retained by the caller, which must guarantee that
  56                   they remain valid until the handler is called.
  57                 </p></dd>
  58 <dt><span class="term">handler</span></dt>
  59 <dd>
  60 <p>
  61                   The handler to be called when the send operation completes. Copies
  62                   will be made of the handler as required. The function signature
  63                   of the handler must be:
  64 </p>
  65 <pre class="programlisting">void handler(
  66   const boost::system::error_code&amp; error, // Result of operation.
  67   std::size_t bytes_transferred           // Number of bytes sent.
  68 );
  69 </pre>
  70 <p>
  71                   Regardless of whether the asynchronous operation completes immediately
  72                   or not, the handler will not be invoked from within this function.
  73                   On immediate completion, invocation of the handler will be performed
  74                   in a manner equivalent to using <a class="link" href="../../post.html" title="post"><code class="computeroutput">post</code></a>.
  75                 </p>
  76 </dd>
  77 </dl>
  78 </div>
  79 <h6>
  80 <a name="boost_asio.reference.basic_raw_socket.async_send.overload1.h1"></a>
  81             <span class="phrase"><a name="boost_asio.reference.basic_raw_socket.async_send.overload1.remarks"></a></span><a class="link" href="overload1.html#boost_asio.reference.basic_raw_socket.async_send.overload1.remarks">Remarks</a>
  82           </h6>
  83 <p>
  84             The async_send operation can only be used with a connected socket. Use
  85             the async_send_to function to send data on an unconnected raw socket.
  86           </p>
  87 <h6>
  88 <a name="boost_asio.reference.basic_raw_socket.async_send.overload1.h2"></a>
  89             <span class="phrase"><a name="boost_asio.reference.basic_raw_socket.async_send.overload1.example"></a></span><a class="link" href="overload1.html#boost_asio.reference.basic_raw_socket.async_send.overload1.example">Example</a>
  90           </h6>
  91 <p>
  92             To send a single data buffer use the <a class="link" href="../../buffer.html" title="buffer"><code class="computeroutput">buffer</code></a>
  93             function as follows:
  94           </p>
  95 <pre class="programlisting">socket.async_send(boost::asio::buffer(data, size), handler);
  96 </pre>
  97 <p>
  98             See the <a class="link" href="../../buffer.html" title="buffer"><code class="computeroutput">buffer</code></a>
  99             documentation for information on sending multiple buffers in one go,
 100             and how to use it with arrays, boost::array or std::vector.
 101           </p>
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