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<h2><span class="refentrytitle">Function template test_any</span></h2>
<p>boost::mpi::test_any — Test whether any non-blocking request has completed. </p>
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<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.nonblocking_hpp" title="Header <boost/mpi/nonblocking.hpp>">boost/mpi/nonblocking.hpp</a>>
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<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <a class="link" href="../../ForwardIterator.html" title="Concept ForwardIterator">ForwardIterator</a><span class="special">></span>
<span class="identifier">optional</span><span class="special"><</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special"><</span> <a class="link" href="status.html" title="Class status">status</a><span class="special">,</span> <span class="identifier">ForwardIterator</span> <span class="special">></span> <span class="special">></span>
<span class="identifier">test_any</span><span class="special">(</span><span class="identifier">ForwardIterator</span> first<span class="special">,</span> <span class="identifier">ForwardIterator</span> last<span class="special">)</span><span class="special">;</span></pre></div>
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<a name="id-1.3.27.7.17.5.4"></a><h2>Description</h2>
<p>This routine takes in a set of requests stored in the iterator range <code class="computeroutput"></code>[first,last) and tests whether any of these requests has been completed. This routine is similar to <code class="computeroutput">wait_any</code>, but will not block waiting for requests to completed. It provides functionality equivalent to <code class="computeroutput">MPI_Testany</code>.</p>
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<td><p><span class="term">Parameters:</span></p></td>
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<td><p><span class="term"><code class="computeroutput">first</code></span></p></td>
<td><p>The iterator that denotes the beginning of the sequence of request objects.</p></td>
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<td><p><span class="term"><code class="computeroutput">last</code></span></p></td>
<td><p>The iterator that denotes the end of the sequence of request objects.</p></td>
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<td><p><span class="term">Returns:</span></p></td>
<td><p>If any outstanding requests have completed, a pair containing the status object that corresponds to the completed operation and the iterator referencing the completed request. Otherwise, an empty <code class="computeroutput">optional<></code>. </p></td>
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<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 <ulink url="http://www.boost.org/LICENSE_1_0.txt">
http://www.boost.org/LICENSE_1_0.txt </ulink>)
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