1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>basic_socket::available (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="../available.html" title="basic_socket::available"> 9<link rel="prev" href="../available.html" title="basic_socket::available"> 10<link rel="next" href="overload2.html" title="basic_socket::available (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="../available.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../available.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_socket.available.overload1"></a><a class="link" href="overload1.html" title="basic_socket::available (1 of 2 overloads)">basic_socket::available 28 (1 of 2 overloads)</a> 29</h5></div></div></div> 30<p> 31 Determine the number of bytes available for reading. 32 </p> 33<pre class="programlisting">std::size_t available() const; 34</pre> 35<p> 36 This function is used to determine the number of bytes that may be read 37 without blocking. 38 </p> 39<h6> 40<a name="boost_asio.reference.basic_socket.available.overload1.h0"></a> 41 <span class="phrase"><a name="boost_asio.reference.basic_socket.available.overload1.return_value"></a></span><a class="link" href="overload1.html#boost_asio.reference.basic_socket.available.overload1.return_value">Return 42 Value</a> 43 </h6> 44<p> 45 The number of bytes that may be read without blocking, or 0 if an error 46 occurs. 47 </p> 48<h6> 49<a name="boost_asio.reference.basic_socket.available.overload1.h1"></a> 50 <span class="phrase"><a name="boost_asio.reference.basic_socket.available.overload1.exceptions"></a></span><a class="link" href="overload1.html#boost_asio.reference.basic_socket.available.overload1.exceptions">Exceptions</a> 51 </h6> 52<div class="variablelist"> 53<p class="title"><b></b></p> 54<dl class="variablelist"> 55<dt><span class="term">boost::system::system_error</span></dt> 56<dd><p> 57 Thrown on failure. 58 </p></dd> 59</dl> 60</div> 61</div> 62<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 63<td align="left"></td> 64<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 65 Kohlhoff<p> 66 Distributed under the Boost Software License, Version 1.0. (See accompanying 67 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>) 68 </p> 69</div></td> 70</tr></table> 71<hr> 72<div class="spirit-nav"> 73<a accesskey="p" href="../available.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../available.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> 74</div> 75</body> 76</html> 77
