72 lines
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HTML
72 lines
4.5 KiB
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Higher Level Abstractions</title>
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<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
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<link rel="home" href="../../../index.html" title="Asio">
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<link rel="up" href="../model.html" title="Asynchronous Model">
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<link rel="prev" href="library_elements.html" title="Supporting Library Elements">
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<link rel="next" href="../core.html" title="Core Concepts and Functionality">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="library_elements.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../model.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../core.html"><img src="../../../next.png" alt="Next"></a>
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</div>
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<div class="section">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="asio.overview.model.higher_levels"></a><a class="link" href="higher_levels.html" title="Higher Level Abstractions">Higher Level Abstractions</a>
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</h4></div></div></div>
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<p>
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<span class="inlinemediaobject"><img src="../../../higher_level_model.png" width="940"></span>
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</p>
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<p>
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The asynchronous model presented in this section provides a basis for defining
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higher level abstractions. Asio builds on this core model to provide additional
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facilities, such as:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem">
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I/O objects such as <a class="link" href="../networking.html" title="Networking">sockets</a>
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and <a class="link" href="../timers.html" title="Timers">timers</a> that expose
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asynchronous operations on top of this model.
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</li>
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<li class="listitem">
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Concrete executors, such as the <a class="link" href="../../reference/io_context.html" title="io_context">io_context</a>
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executor, <a class="link" href="../../reference/thread_pool.html" title="thread_pool">thread_pool</a>
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executor, and the <a class="link" href="../../reference/strand.html" title="strand">strand</a>
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adapter which guarantees non-concurrent execution of completion handlers.
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</li>
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<li class="listitem">
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Completion tokens that facilitate different composition mechanisms,
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such as <a class="link" href="../composition/cpp20_coroutines.html" title="C++20 Coroutines Support">C++
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coroutines</a>, <a class="link" href="../composition/spawn.html" title="Stackful Coroutines">stackful
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coroutines</a>, <a class="link" href="../composition/futures.html" title="Futures">futures</a>,
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and <a class="link" href="../../reference/deferred.html" title="deferred">deferred operations</a>.
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</li>
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<li class="listitem">
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High level support for C++ coroutines that combines support executors
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and cancellation slots to allow for <a class="link" href="../composition/cpp20_coroutines.html#asio.overview.composition.cpp20_coroutines.co_ordinating_parallel_coroutines">easy
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coordination of concurrent asynchronous agents</a>.
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</li>
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</ul></div>
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<p>
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To allow users to more easily write their own asynchronous operations that
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adhere to this model, Asio also provides the helper function <a class="link" href="../../reference/async_compose.html" title="async_compose">async_compose</a>.
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</p>
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</div>
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<div class="copyright-footer">Copyright © 2003-2023 Christopher M. Kohlhoff<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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>)
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</p>
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</div>
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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="library_elements.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../model.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="../core.html"><img src="../../../next.png" alt="Next"></a>
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</div>
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</body>
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</html>
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