1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>basic_raw_socket::async_send (1 of 2 overloads)</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../boost_asio.html" title="Boost.Asio"> 8<link rel="up" href="../async_send.html" title="basic_raw_socket::async_send"> 9<link rel="prev" href="../async_send.html" title="basic_raw_socket::async_send"> 10<link rel="next" href="overload2.html" title="basic_raw_socket::async_send (2 of 2 overloads)"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="../async_send.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../async_send.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../boost_asio.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="overload2.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 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< 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>> 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 & buffers, 38 WriteHandler && 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& 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> 102</div> 103<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 104<td align="left"></td> 105<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 106 Kohlhoff<p> 107 Distributed under the Boost Software License, Version 1.0. (See accompanying 108 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>) 109 </p> 110</div></td> 111</tr></table> 112<hr> 113<div class="spirit-nav"> 114<a accesskey="p" href="../async_send.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../async_send.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../boost_asio.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="overload2.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 115</div> 116</body> 117</html> 118
