1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>windows::basic_random_access_handle::write_some_at (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="../write_some_at.html" title="windows::basic_random_access_handle::write_some_at"> 9<link rel="prev" href="../write_some_at.html" title="windows::basic_random_access_handle::write_some_at"> 10<link rel="next" href="overload2.html" title="windows::basic_random_access_handle::write_some_at (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="../write_some_at.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../write_some_at.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.windows__basic_random_access_handle.write_some_at.overload1"></a><a class="link" href="overload1.html" title="windows::basic_random_access_handle::write_some_at (1 of 2 overloads)">windows::basic_random_access_handle::write_some_at 28 (1 of 2 overloads)</a> 29</h5></div></div></div> 30<p> 31 Write some data to the handle at the specified offset. 32 </p> 33<pre class="programlisting">template< 34 typename <a class="link" href="../../ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>> 35std::size_t write_some_at( 36 uint64_t offset, 37 const ConstBufferSequence & buffers); 38</pre> 39<p> 40 This function is used to write data to the random-access handle. The 41 function call will block until one or more bytes of the data has been 42 written successfully, or until an error occurs. 43 </p> 44<h6> 45<a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.h0"></a> 46 <span class="phrase"><a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.parameters"></a></span><a class="link" href="overload1.html#boost_asio.reference.windows__basic_random_access_handle.write_some_at.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">offset</span></dt> 52<dd><p> 53 The offset at which the data will be written. 54 </p></dd> 55<dt><span class="term">buffers</span></dt> 56<dd><p> 57 One or more data buffers to be written to the handle. 58 </p></dd> 59</dl> 60</div> 61<h6> 62<a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.h1"></a> 63 <span class="phrase"><a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.return_value"></a></span><a class="link" href="overload1.html#boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.return_value">Return 64 Value</a> 65 </h6> 66<p> 67 The number of bytes written. 68 </p> 69<h6> 70<a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.h2"></a> 71 <span class="phrase"><a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.exceptions"></a></span><a class="link" href="overload1.html#boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.exceptions">Exceptions</a> 72 </h6> 73<div class="variablelist"> 74<p class="title"><b></b></p> 75<dl class="variablelist"> 76<dt><span class="term">boost::system::system_error</span></dt> 77<dd><p> 78 Thrown on failure. An error code of <code class="computeroutput">boost::asio::error::eof</code> 79 indicates that the connection was closed by the peer. 80 </p></dd> 81</dl> 82</div> 83<h6> 84<a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.h3"></a> 85 <span class="phrase"><a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.remarks"></a></span><a class="link" href="overload1.html#boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.remarks">Remarks</a> 86 </h6> 87<p> 88 The write_some_at operation may not write all of the data. Consider using 89 the <a class="link" href="../../write_at.html" title="write_at"><code class="computeroutput">write_at</code></a> 90 function if you need to ensure that all data is written before the blocking 91 operation completes. 92 </p> 93<h6> 94<a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.h4"></a> 95 <span class="phrase"><a name="boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.example"></a></span><a class="link" href="overload1.html#boost_asio.reference.windows__basic_random_access_handle.write_some_at.overload1.example">Example</a> 96 </h6> 97<p> 98 To write a single data buffer use the <a class="link" href="../../buffer.html" title="buffer"><code class="computeroutput">buffer</code></a> 99 function as follows: 100 </p> 101<pre class="programlisting">handle.write_some_at(42, boost::asio::buffer(data, size)); 102</pre> 103<p> 104 See the <a class="link" href="../../buffer.html" title="buffer"><code class="computeroutput">buffer</code></a> 105 documentation for information on writing multiple buffers in one go, 106 and how to use it with arrays, boost::array or std::vector. 107 </p> 108</div> 109<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 110<td align="left"></td> 111<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 112 Kohlhoff<p> 113 Distributed under the Boost Software License, Version 1.0. (See accompanying 114 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>) 115 </p> 116</div></td> 117</tr></table> 118<hr> 119<div class="spirit-nav"> 120<a accesskey="p" href="../write_some_at.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../write_some_at.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> 121</div> 122</body> 123</html> 124
