projects / ceph.git / blame
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|---|---|---|
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1 | <html> |
| 2 | <head> | |
| 3 | <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> | |
| 4 | <title>Context classes</title> | |
| 5 | <link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> | |
| 6 | <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> | |
| 7 | <link rel="home" href="../index.html" title="Chapter 1. Context"> | |
| 8 | <link rel="up" href="../index.html" title="Chapter 1. Context"> | |
| 9 | <link rel="prev" href="requirements.html" title="Requirements"> | |
| 10 | <link rel="next" href="abstract_context/econtext.html" title="Class execution_context"> | |
| 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="requirements.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="abstract_context/econtext.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> | |
| 24 | </div> | |
| 25 | <div class="section"> | |
| 26 | <div class="titlepage"><div><div><h2 class="title" style="clear: both"> | |
| 27 | <a name="context.abstract_context"></a><a class="link" href="abstract_context.html" title="Context classes">Context classes</a> | |
| 28 | </h2></div></div></div> | |
| 29 | <div class="toc"><dl> | |
| 30 | <dt><span class="section"><a href="abstract_context/econtext.html">Class execution_context</a></span></dt> | |
| 31 | <dt><span class="section"><a href="abstract_context/ccontext.html">Class captured_context</a></span></dt> | |
| 32 | <dt><span class="section"><a href="abstract_context/stack.html">Stack allocation</a></span></dt> | |
| 33 | <dd><dl> | |
| 34 | <dt><span class="section"><a href="abstract_context/stack/protected_fixedsize.html">Class | |
| 35 | <span class="emphasis"><em>protected_fixedsize</em></span></a></span></dt> | |
| 36 | <dt><span class="section"><a href="abstract_context/stack/fixedsize.html">Class <span class="emphasis"><em>fixedsize_stack</em></span></a></span></dt> | |
| 37 | <dt><span class="section"><a href="abstract_context/stack/segmented.html">Class <span class="emphasis"><em>segmented_stack</em></span></a></span></dt> | |
| 38 | <dt><span class="section"><a href="abstract_context/stack/stack_traits.html">Class | |
| 39 | <span class="emphasis"><em>stack_traits</em></span></a></span></dt> | |
| 40 | <dt><span class="section"><a href="abstract_context/stack/stack_context.html">Class | |
| 41 | <span class="emphasis"><em>stack_context</em></span></a></span></dt> | |
| 42 | <dt><span class="section"><a href="abstract_context/stack/valgrind.html">Support for | |
| 43 | valgrind</a></span></dt> | |
| 44 | </dl></dd> | |
| 45 | </dl></div> | |
| 46 | <p> | |
| 47 | <span class="bold"><strong>Boost.Context</strong></span> provides two classes encapsulating | |
| 48 | <span class="emphasis"><em>fcontext_t</em></span> and related functions (<span class="emphasis"><em>jump_fcontext()</em></span> | |
| 49 | and <span class="emphasis"><em>make_fcontext()</em></span>) and stack management - <span class="emphasis"><em>execution_context</em></span> | |
| 50 | and <span class="emphasis"><em>captured_context</em></span>. <span class="emphasis"><em>execution_context</em></span> | |
| 51 | and <span class="emphasis"><em>captured_context</em></span> represent one <span class="emphasis"><em>thread-of-execution</em></span>. | |
| 52 | A <span class="emphasis"><em>thread-of-execution</em></span> is a single flow of control within | |
| 53 | a programm. Each class maintains a control structure, containing the preserved | |
| 54 | registers, the stack and the stack allocator. The main difference between | |
| 55 | <span class="emphasis"><em>execution_context</em></span> and <span class="emphasis"><em>captured_context</em></span> | |
| 56 | consists in maintaining context' control structure. | |
| 57 | </p> | |
| 58 | </div> | |
| 59 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
| 60 | <td align="left"></td> | |
| 61 | <td align="right"><div class="copyright-footer">Copyright © 2014 Oliver Kowalke<p> | |
| 62 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 63 | 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>) | |
| 64 | </p> | |
| 65 | </div></td> | |
| 66 | </tr></table> | |
| 67 | <hr> | |
| 68 | <div class="spirit-nav"> | |
| 69 | <a accesskey="p" href="requirements.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="abstract_context/econtext.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> | |
| 70 | </div> | |
| 71 | </body> | |
| 72 | </html> |