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diff --git a/doc/html/boost/mpi/gather_idp902033616.html b/doc/html/boost/mpi/gather_idp902033616.html new file mode 100644 index 0000000000..202562c5f6 --- /dev/null +++ b/doc/html/boost/mpi/gather_idp902033616.html @@ -0,0 +1,108 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> +<title>Function gather</title> +<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> +<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> +<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> +<link rel="up" href="../../mpi/reference.html#header.boost.mpi.collectives_hpp" title="Header <boost/mpi/collectives.hpp>"> +<link rel="prev" href="broadcast.html" title="Function broadcast"> +<link rel="next" href="gatherv.html" title="Function gatherv"> +</head> +<body 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alt="Home"></a><a accesskey="n" href="gatherv.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +<div class="refentry"> +<a name="boost.mpi.gather_idp902033616"></a><div class="titlepage"></div> +<div class="refnamediv"> +<h2><span class="refentrytitle">Function gather</span></h2> +<p>boost::mpi::gather — Gather the values stored at every process into a vector at the root process. </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.collectives_hpp" title="Header <boost/mpi/collectives.hpp>">boost/mpi/collectives.hpp</a>> + +</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> + <span class="keyword">void</span> <span class="identifier">gather</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="communicator.html" title="Class communicator">communicator</a> <span class="special">&</span> comm<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&</span> in_value<span class="special">,</span> + <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span> <span class="special">&</span> out_values<span class="special">,</span> <span class="keyword">int</span> root<span class="special">)</span><span class="special">;</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> + <span class="keyword">void</span> <span class="identifier">gather</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="communicator.html" title="Class communicator">communicator</a> <span class="special">&</span> comm<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&</span> in_value<span class="special">,</span> <span class="identifier">T</span> <span class="special">*</span> out_values<span class="special">,</span> + <span class="keyword">int</span> root<span class="special">)</span><span class="special">;</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> + <span class="keyword">void</span> <span class="identifier">gather</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="communicator.html" title="Class communicator">communicator</a> <span class="special">&</span> comm<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&</span> in_value<span class="special">,</span> <span class="keyword">int</span> root<span class="special">)</span><span class="special">;</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> + <span class="keyword">void</span> <span class="identifier">gather</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="communicator.html" title="Class communicator">communicator</a> <span class="special">&</span> comm<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span> in_values<span class="special">,</span> <span class="keyword">int</span> n<span class="special">,</span> + <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span> <span class="identifier">T</span> <span class="special">></span> <span class="special">&</span> out_values<span class="special">,</span> <span class="keyword">int</span> root<span class="special">)</span><span class="special">;</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> + <span class="keyword">void</span> <span class="identifier">gather</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="communicator.html" title="Class communicator">communicator</a> <span class="special">&</span> comm<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span> in_values<span class="special">,</span> <span class="keyword">int</span> n<span class="special">,</span> + <span class="identifier">T</span> <span class="special">*</span> out_values<span class="special">,</span> <span class="keyword">int</span> root<span class="special">)</span><span class="special">;</span> +<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> T<span class="special">></span> + <span class="keyword">void</span> <span class="identifier">gather</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="communicator.html" title="Class communicator">communicator</a> <span class="special">&</span> comm<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">*</span> in_values<span class="special">,</span> <span class="keyword">int</span> n<span class="special">,</span> <span class="keyword">int</span> root<span class="special">)</span><span class="special">;</span></pre></div> +<div class="refsect1"> +<a name="idp513299664"></a><h2>Description</h2> +<p><code class="computeroutput">gather</code> is a collective algorithm that collects the values stored at each process into a vector of values at the <code class="computeroutput">root</code> process. This vector is indexed by the process number that the value came from. The type <code class="computeroutput">T</code> of the values may be any type that is serializable or has an associated MPI data type.</p> +<p>When the type <code class="computeroutput">T</code> has an associated MPI data type, this routine invokes <code class="computeroutput">MPI_Gather</code> to gather the values.</p> +<p> +</p> +<div class="variablelist"><table border="0" class="variablelist compact"> +<colgroup> +<col align="left" valign="top"> +<col> +</colgroup> +<tbody><tr> +<td><p><span class="term">Parameters:</span></p></td> +<td><div class="variablelist"><table border="0" class="variablelist compact"> +<colgroup> +<col align="left" valign="top"> +<col> +</colgroup> +<tbody> +<tr> +<td><p><span class="term"><code class="computeroutput">comm</code></span></p></td> +<td><p>The communicator over which the gather will occur.</p></td> +</tr> +<tr> +<td><p><span class="term"><code class="computeroutput">in_value</code></span></p></td> +<td><p>The value to be transmitted by each process. For gathering arrays of values, <code class="computeroutput">in_values</code> points to storage for <code class="computeroutput">n*comm</code>.size() values.</p></td> +</tr> +<tr> +<td><p><span class="term"><code class="computeroutput">out_values</code></span></p></td> +<td><p>A vector or pointer to storage that will be populated with the values from each process, indexed by the process ID number. If it is a vector, it will be resized accordingly. For non-root processes, this parameter may be omitted. If it is still provided, however, it will be unchanged.</p></td> +</tr> +<tr> +<td><p><span class="term"><code class="computeroutput">root</code></span></p></td> +<td><p>The process ID number that will collect the values. This value must be the same on all processes. </p></td> +</tr> +</tbody> +</table></div></td> +</tr></tbody> +</table></div> +</div> +</div> +<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> +<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>) + </p> +</div></td> +</tr></table> +<hr> +<div class="spirit-nav"> +<a accesskey="p" href="broadcast.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../mpi/reference.html#header.boost.mpi.collectives_hpp"><img src="../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="gatherv.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> +</div> +</body> +</html> |