85 lines
5.3 KiB
HTML
85 lines
5.3 KiB
HTML
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
|
<title>Requirements on asynchronous socket operations</title>
|
|
<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css">
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
|
|
<link rel="home" href="../../boost_asio.html" title="Boost.Asio">
|
|
<link rel="up" href="../reference.html" title="Reference">
|
|
<link rel="prev" href="synchronous_socket_operations.html" title="Requirements on synchronous socket operations">
|
|
<link rel="next" href="AcceptableProtocol.html" title="Acceptable protocol requirements">
|
|
</head>
|
|
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
|
<table cellpadding="2" width="100%"><tr>
|
|
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td>
|
|
<td align="center"><a href="../../../../index.html">Home</a></td>
|
|
<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td>
|
|
<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td>
|
|
<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
|
|
<td align="center"><a href="../../../../more/index.htm">More</a></td>
|
|
</tr></table>
|
|
<hr>
|
|
<div class="spirit-nav">
|
|
<a accesskey="p" href="synchronous_socket_operations.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="AcceptableProtocol.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
|
|
</div>
|
|
<div class="section">
|
|
<div class="titlepage"><div><div><h3 class="title">
|
|
<a name="boost_asio.reference.asynchronous_socket_operations"></a><a class="link" href="asynchronous_socket_operations.html" title="Requirements on asynchronous socket operations">Requirements
|
|
on asynchronous socket operations</a>
|
|
</h3></div></div></div>
|
|
<p>
|
|
In this library, <span class="emphasis"><em>asynchronous socket operations</em></span> are
|
|
those member functions having prefix <code class="computeroutput">async_</code>.
|
|
</p>
|
|
<p>
|
|
For an object <code class="computeroutput">s</code>, a program may initiate asynchronous socket
|
|
operations such that there are multiple simultaneously outstanding asynchronous
|
|
operations.
|
|
</p>
|
|
<p>
|
|
When there are multiple outstanding asynchronous <a class="link" href="read_write_operations.html" title="Requirements on read and write operations">read
|
|
operations</a> on <code class="computeroutput">s</code>:
|
|
</p>
|
|
<p>
|
|
— having no argument <code class="computeroutput">flags</code> of type <code class="computeroutput">socket_base::message_flags</code>,
|
|
or
|
|
</p>
|
|
<p>
|
|
— having an argument <code class="computeroutput">flags</code> of type <code class="computeroutput">socket_base::message_flags</code>
|
|
but where <code class="computeroutput">(flags & socket_base::message_out_of_band) == 0</code>
|
|
</p>
|
|
<p>
|
|
then the <code class="computeroutput">buffers</code> are filled in the order in which these operations
|
|
were issued. The order of invocation of the completion handlers for these
|
|
operations is unspecified.
|
|
</p>
|
|
<p>
|
|
When there are multiple outstanding asynchronous <a class="link" href="read_write_operations.html" title="Requirements on read and write operations">read
|
|
operations</a> on <code class="computeroutput">s</code> having an argument <code class="computeroutput">flags</code>
|
|
of type <code class="computeroutput">socket_base::message_flags</code> where <code class="computeroutput">(flags &
|
|
socket_base::message_out_of_band) != 0</code> then the <code class="computeroutput">buffers</code>
|
|
are filled in the order in which these operations were issued.
|
|
</p>
|
|
<p>
|
|
When there are multiple outstanding asynchronous <a class="link" href="read_write_operations.html" title="Requirements on read and write operations">write
|
|
operations</a> on <code class="computeroutput">s</code>, the <code class="computeroutput">buffers</code> are transmitted
|
|
in the order in which these operations were issued. The order of invocation
|
|
of the completion handlers for these operations is unspecified.
|
|
</p>
|
|
</div>
|
|
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
|
|
<td align="left"></td>
|
|
<td align="right"><div class="copyright-footer">Copyright © 2003-2021 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>)
|
|
</p>
|
|
</div></td>
|
|
</tr></table>
|
|
<hr>
|
|
<div class="spirit-nav">
|
|
<a accesskey="p" href="synchronous_socket_operations.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="AcceptableProtocol.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
|
|
</div>
|
|
</body>
|
|
</html>
|