projects / ceph.git / blame
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| 3 | <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> | |
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| 7 | <link rel="home" href="../../index.html" title="Chapter 1. Context"> | |
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| 24 | </div> | |
| 25 | <div class="section"> | |
| 26 | <div class="titlepage"><div><div><h3 class="title"> | |
| 27 | <a name="context.econtext.rationale"></a><a class="link" href="rationale.html" title="Rationale">Rationale</a> | |
| 28 | </h3></div></div></div> | |
| 29 | <div class="toc"><dl> | |
| 30 | <dt><span class="section"><a href="rationale/other_apis_.html">Other APIs | |
| 31 | </a></span></dt> | |
| 32 | <dt><span class="section"><a href="rationale/x86_and_floating_point_env.html">x86 | |
| 33 | and floating-point env</a></span></dt> | |
| 34 | </dl></div> | |
| 35 | <h5> | |
| 36 | <a name="context.econtext.rationale.h0"></a> | |
| 37 | <span><a name="context.econtext.rationale.no_inline_assembler"></a></span><a class="link" href="rationale.html#context.econtext.rationale.no_inline_assembler">No | |
| 38 | inline-assembler</a> | |
| 39 | </h5> | |
| 40 | <p> | |
| 41 | Some newer compiler (for instance MSVC 10 for x86_64 and itanium) do not | |
| 42 | support inline assembler. <sup>[<a name="context.econtext.rationale.f0" href="#ftn.context.econtext.rationale.f0" class="footnote">1</a>]</sup>. Inlined assembler generates code bloating which is not welcome | |
| 43 | on embedded systems. | |
| 44 | </p> | |
| 45 | <h5> | |
| 46 | <a name="context.econtext.rationale.h1"></a> | |
| 47 | <span><a name="context.econtext.rationale.fcontext_t"></a></span><a class="link" href="rationale.html#context.econtext.rationale.fcontext_t">fcontext_t</a> | |
| 48 | </h5> | |
| 49 | <p> | |
| 50 | <span class="bold"><strong>Boost.Context</strong></span> provides the low level API | |
| 51 | fcontext_t which is implemented in assembler to provide context swapping | |
| 52 | operations. fcontext_t is the part to port to new platforms. | |
| 53 | </p> | |
| 54 | <div class="note"><table border="0" summary="Note"> | |
| 55 | <tr> | |
| 56 | <td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../../../doc/src/images/note.png"></td> | |
| 57 | <th align="left">Note</th> | |
| 58 | </tr> | |
| 59 | <tr><td align="left" valign="top"><p> | |
| 60 | Context switches do not preserve the signal mask on UNIX systems. | |
| 61 | </p></td></tr> | |
| 62 | </table></div> | |
| 63 | <p> | |
| 64 | <span class="emphasis"><em>fcontext_t</em></span> is an opaque pointer. | |
| 65 | </p> | |
| 66 | <div class="footnotes"> | |
| 67 | <br><hr width="100" align="left"> | |
| 68 | <div class="footnote"><p><sup>[<a name="ftn.context.econtext.rationale.f0" href="#context.econtext.rationale.f0" class="para">1</a>] </sup> | |
| 69 | <a href="http://msdn.microsoft.com/en-us/library/4ks26t93.aspx" target="_top">MSDN | |
| 70 | article 'Inline Assembler'</a> | |
| 71 | </p></div> | |
| 72 | </div> | |
| 73 | </div> | |
| 74 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
| 75 | <td align="left"></td> | |
| 76 | <td align="right"><div class="copyright-footer">Copyright © 2014 Oliver Kowalke<p> | |
| 77 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 78 | 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>) | |
| 79 | </p> | |
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| 85 | </div> | |
| 86 | </body> | |
| 87 | </html> |