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| <a name="boost.mpi.threading.level"></a><div class="titlepage"></div> |
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| <h2><span class="refentrytitle">Type level</span></h2> |
| <p>boost::mpi::threading::level — specify the supported threading level. </p> |
| </div> |
| <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
| <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../../mpi/reference.html#header.boost.mpi.environment_hpp" title="Header <boost/mpi/environment.hpp>">boost/mpi/environment.hpp</a>> |
| |
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| <span class="keyword">enum</span> <span class="identifier">level</span> <span class="special">{</span> <a class="link" href="level.html#boost.mpi.threading.level.single">single</a> = = MPI_THREAD_SINGLE, <a class="link" href="level.html#boost.mpi.threading.level.funneled">funneled</a> = = MPI_THREAD_FUNNELED, |
| <a class="link" href="level.html#boost.mpi.threading.level.serialized">serialized</a> = = MPI_THREAD_SERIALIZED, |
| <a class="link" href="level.html#boost.mpi.threading.level.multiple">multiple</a> = = MPI_THREAD_MULTIPLE <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="idp333077920"></a><h2>Description</h2> |
| <p>Based on MPI 2 standard/8.7.3 </p> |
| <div class="variablelist"><dl class="variablelist compact"> |
| <dt><span class="term"><code class="computeroutput">single</code><a name="boost.mpi.threading.level.single"></a></span></dt> |
| <dd><p>Only one thread will execute. </p></dd> |
| <dt><span class="term"><code class="computeroutput">funneled</code><a name="boost.mpi.threading.level.funneled"></a></span></dt> |
| <dd> |
| <p>Only main thread will do MPI calls.</p> |
| <p>The process may be multi-threaded, but only the main thread will make MPI calls (all MPI calls are ``funneled'' to the main thread). </p> |
| </dd> |
| <dt><span class="term"><code class="computeroutput">serialized</code><a name="boost.mpi.threading.level.serialized"></a></span></dt> |
| <dd> |
| <p>Only one thread at the time do MPI calls.</p> |
| <p>The process may be multi-threaded, and multiple threads may make MPI calls, but only one at a time: MPI calls are not made concurrently from two distinct threads (all MPI calls are ``serialized''). </p> |
| </dd> |
| <dt><span class="term"><code class="computeroutput">multiple</code><a name="boost.mpi.threading.level.multiple"></a></span></dt> |
| <dd> |
| <p>Multiple thread may do MPI calls.</p> |
| <p>Multiple threads may call MPI, with no restrictions. </p> |
| </dd> |
| </dl></div> |
| </div> |
| </div> |
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| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2005-2007 Douglas Gregor, |
| Matthias Troyer, Trustees of Indiana University<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>) |
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