libstdc++-v3/doc/html/manual/bk01pt03ch18s02.html

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   3 <html xmlns="http://www.w3.org/1999/xhtml"><head><title>Semantics</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.76.1"/><meta name="keywords" content="&#10;      C++&#10;    , &#10;      library&#10;    , &#10;      parallel&#10;    "/><meta name="keywords" content="&#10;      ISO C++&#10;    , &#10;      library&#10;    "/><link rel="home" href="../spine.html" title="The GNU C++ Library"/><link rel="up" href="parallel_mode.html" title="Chapter 18. Parallel Mode"/><link rel="prev" href="parallel_mode.html" title="Chapter 18. Parallel Mode"/><link rel="next" href="bk01pt03ch18s03.html" title="Using"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Semantics</th></tr><tr><td align="left"><a accesskey="p" href="parallel_mode.html">Prev</a> </td><th width="60%" align="center">Chapter 18. Parallel Mode</th><td align="right"> <a accesskey="n" href="bk01pt03ch18s03.html">Next</a></td></tr></table><hr/></div><div class="section" title="Semantics"><div class="titlepage"><div><div><h2 class="title"><a id="manual.ext.parallel_mode.semantics"/>Semantics</h2></div></div></div><p> The parallel mode STL algorithms are currently not exception-safe,
   4 i.e. user-defined functors must not throw exceptions.
   5 Also, the order of execution is not guaranteed for some functions, of course.
   6 Therefore, user-defined functors should not have any concurrent side effects.
   7 </p><p> Since the current GCC OpenMP implementation does not support
   8 OpenMP parallel regions in concurrent threads,
   9 it is not possible to call parallel STL algorithm in
  10 concurrent threads, either.
  11 It might work with other compilers, though.</p></div><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td align="left"><a accesskey="p" href="parallel_mode.html">Prev</a> </td><td align="center"><a accesskey="u" href="parallel_mode.html">Up</a></td><td align="right"> <a accesskey="n" href="bk01pt03ch18s03.html">Next</a></td></tr><tr><td align="left" valign="top">Chapter 18. Parallel Mode </td><td align="center"><a accesskey="h" href="../spine.html">Home</a></td><td align="right" valign="top"> Using</td></tr></table></div></body></html>