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| <dt><span class="section"><a href="porting.html#atomic.porting.unit_tests">Unit tests</a></span></dt> |
| <dt><span class="section"><a href="porting.html#atomic.porting.tested_compilers">Tested compilers</a></span></dt> |
| <dt><span class="section"><a href="porting.html#atomic.porting.acknowledgements">Acknowledgements</a></span></dt> |
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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="atomic.porting.unit_tests"></a><a class="link" href="porting.html#atomic.porting.unit_tests" title="Unit tests">Unit tests</a> |
| </h3></div></div></div> |
| <p> |
| <span class="bold"><strong>Boost.Atomic</strong></span> provides a unit test suite |
| to verify that the implementation behaves as expected: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| <span class="bold"><strong>fallback_api.cpp</strong></span> verifies that the fallback-to-locking |
| aspect of <span class="bold"><strong>Boost.Atomic</strong></span> compiles and |
| has correct value semantics. |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>native_api.cpp</strong></span> verifies that all atomic |
| operations have correct value semantics (e.g. "fetch_add" really |
| adds the desired value, returning the previous). It is a rough "smoke-test" |
| to help weed out the most obvious mistakes (for example width overflow, |
| signed/unsigned extension, ...). |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>lockfree.cpp</strong></span> verifies that the <span class="bold"><strong>BOOST_ATOMIC_*_LOCKFREE</strong></span> macros are set properly |
| according to the expectations for a given platform, and that they match |
| up with the <span class="bold"><strong>is_lock_free</strong></span> member functions |
| of the <span class="bold"><strong>atomic</strong></span> object instances. |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>atomicity.cpp</strong></span> lets two threads race |
| against each other modifying a shared variable, verifying that the operations |
| behave atomic as appropriate. By nature, this test is necessarily stochastic, |
| and the test self-calibrates to yield 99% confidence that a positive |
| result indicates absence of an error. This test is very useful on uni-processor |
| systems with preemption already. |
| </li> |
| <li class="listitem"> |
| <span class="bold"><strong>ordering.cpp</strong></span> lets two threads race against |
| each other accessing multiple shared variables, verifying that the operations |
| exhibit the expected ordering behavior. By nature, this test is necessarily |
| stochastic, and the test attempts to self-calibrate to yield 99% confidence |
| that a positive result indicates absence of an error. This only works |
| on true multi-processor (or multi-core) systems. It does not yield any |
| result on uni-processor systems or emulators (due to there being no observable |
| reordering even the order=relaxed case) and will report that fact. |
| </li> |
| </ul></div> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="atomic.porting.tested_compilers"></a><a class="link" href="porting.html#atomic.porting.tested_compilers" title="Tested compilers">Tested compilers</a> |
| </h3></div></div></div> |
| <p> |
| <span class="bold"><strong>Boost.Atomic</strong></span> has been tested on and is known |
| to work on the following compilers/platforms: |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| gcc 4.x: i386, x86_64, ppc32, ppc64, sparcv9, armv6, alpha |
| </li> |
| <li class="listitem"> |
| Visual Studio Express 2008/Windows XP, x86, x64, ARM |
| </li> |
| </ul></div> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="atomic.porting.acknowledgements"></a><a class="link" href="porting.html#atomic.porting.acknowledgements" title="Acknowledgements">Acknowledgements</a> |
| </h3></div></div></div> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> |
| Adam Wulkiewicz created the logo used on the <a href="https://github.com/boostorg/atomic" target="_top">GitHub |
| project page</a>. The logo was taken from his <a href="https://github.com/awulkiew/boost-logos" target="_top">collection</a> |
| of Boost logos. |
| </li></ul></div> |
| </div> |
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| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2011 Helge Bahmann<br>Copyright © 2012 Tim Blechmann<br>Copyright © 2013 Andrey Semashev<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> |
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