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  24 </div>
  25 <div class="refentry">
  26 <a name="boost.compute.threefry_engine"></a><div class="titlepage"></div>
  27 <div class="refnamediv">
  28 <h2><span class="refentrytitle">Class template threefry_engine</span></h2>
  29 <p>boost::compute::threefry_engine &#8212; Threefry pseudorandom number generator. </p>
  30 </div>
  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../boost_compute/reference.html#header.boost.compute.random.threefry_engine_hpp" title="Header &lt;boost/compute/random/threefry_engine.hpp&gt;">boost/compute/random/threefry_engine.hpp</a>&gt;
  33
  34 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T <span class="special">=</span> <span class="identifier">uint_</span><span class="special">&gt;</span>
  35 <span class="keyword">class</span> <a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a> <span class="special">{</span>
  36 <span class="keyword">public</span><span class="special">:</span>
  37   <span class="comment">// types</span>
  38   <span class="keyword">typedef</span> <span class="identifier">T</span> <a name="boost.compute.threefry_engine.result_type"></a><span class="identifier">result_type</span><span class="special">;</span>
  39
  40   <span class="comment">// <a class="link" href="threefry_engine.html#boost.compute.threefry_engineconstruct-copy-destruct">construct/copy/destruct</a></span>
  41   <span class="keyword">explicit</span> <a class="link" href="threefry_engine.html#idm46009691762992-bb"><span class="identifier">threefry_engine</span></a><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">ulong_</span> <span class="special">=</span> <span class="identifier">default_seed</span><span class="special">)</span><span class="special">;</span>
  42   <a class="link" href="threefry_engine.html#idm46009691759296-bb"><span class="identifier">threefry_engine</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  43   <a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> <a class="link" href="threefry_engine.html#idm46009691756400-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  44   <a class="link" href="threefry_engine.html#idm46009691753216-bb"><span class="special">~</span><span class="identifier">threefry_engine</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  45
  46   <span class="comment">// <a class="link" href="threefry_engine.html#idm46009691785296-bb">public member functions</a></span>
  47   <span class="keyword">void</span> <a class="link" href="threefry_engine.html#idm46009691784736-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">ulong_</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  48   <span class="keyword">void</span> <a class="link" href="threefry_engine.html#idm46009691780000-bb"><span class="identifier">seed</span></a><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  49   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">&gt;</span>
  50     <span class="keyword">void</span> <a class="link" href="threefry_engine.html#idm46009691777920-bb"><span class="identifier">generate</span></a><span class="special">(</span><span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  51   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">,</span> <span class="keyword">typename</span> Function<span class="special">&gt;</span>
  52     <span class="keyword">void</span> <a class="link" href="threefry_engine.html#idm46009691772944-bb"><span class="identifier">generate</span></a><span class="special">(</span><span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">OutputIterator</span><span class="special">,</span> <span class="identifier">Function</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  53   <span class="keyword">void</span> <a class="link" href="threefry_engine.html#idm46009691766128-bb"><span class="identifier">discard</span></a><span class="special">(</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  54
  55   <span class="comment">// <a class="link" href="threefry_engine.html#idm46009691751904-bb">private member functions</a></span>
  56   <span class="keyword">void</span> <a class="link" href="threefry_engine.html#idm46009691751328-bb"><span class="identifier">load_program</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  57
  58   <span class="comment">// public data members</span>
  59   <span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">ulong_</span> <span class="identifier">default_seed</span><span class="special">;</span>
  60 <span class="special">}</span><span class="special">;</span></pre></div>
  61 <div class="refsect1">
  62 <a name="idm46113316397904"></a><h2>Description</h2>
  63 <div class="refsect2">
  64 <a name="idm46113316397488"></a><h3>
  65 <a name="boost.compute.threefry_engineconstruct-copy-destruct"></a><code class="computeroutput">threefry_engine</code>
  66         public
  67        construct/copy/destruct</h3>
  68 <div class="orderedlist"><ol class="orderedlist" type="1">
  69 <li class="listitem">
  70 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idm46009691762992-bb"></a><span class="identifier">threefry_engine</span><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">,</span> <span class="identifier">ulong_</span> value <span class="special">=</span> <span class="identifier">default_seed</span><span class="special">)</span><span class="special">;</span></pre>Creates a new <code class="computeroutput"><a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a></code> and seeds it with <code class="computeroutput">value</code>. </li>
  71 <li class="listitem">
  72 <pre class="literallayout"><a name="idm46009691759296-bb"></a><span class="identifier">threefry_engine</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>Creates a new <code class="computeroutput"><a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a></code> object as a copy of <code class="computeroutput">other</code>. </li>
  73 <li class="listitem">
  74 <pre class="literallayout"><a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> <a name="idm46009691756400-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>Copies <code class="computeroutput">other</code> to <code class="computeroutput">*this</code>. </li>
  75 <li class="listitem">
  76 <pre class="literallayout"><a name="idm46009691753216-bb"></a><span class="special">~</span><span class="identifier">threefry_engine</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>Destroys the <code class="computeroutput"><a class="link" href="threefry_engine.html" title="Class template threefry_engine">threefry_engine</a></code> object. </li>
  77 </ol></div>
  78 </div>
  79 <div class="refsect2">
  80 <a name="idm46113316356128"></a><h3>
  81 <a name="idm46009691785296-bb"></a><code class="computeroutput">threefry_engine</code> public member functions</h3>
  82 <div class="orderedlist"><ol class="orderedlist" type="1">
  83 <li class="listitem">
  84 <pre class="literallayout"><span class="keyword">void</span> <a name="idm46009691784736-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">ulong_</span> value<span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>
  85 <p>Seeds the random number generator with <code class="computeroutput">value</code>.</p>
  86 <p>
  87 If no seed value is provided, <code class="computeroutput">default_seed</code> is used. </p>
  88 <div class="variablelist"><table border="0" class="variablelist compact">
  89 <colgroup>
  90 <col align="left" valign="top">
  91 <col>
  92 </colgroup>
  93 <tbody><tr>
  94 <td><p><span class="term">Parameters:</span></p></td>
  95 <td><div class="variablelist"><table border="0" class="variablelist compact">
  96 <colgroup>
  97 <col align="left" valign="top">
  98 <col>
  99 </colgroup>
 100 <tbody>
 101 <tr>
 102 <td><p><span class="term"><code class="computeroutput">queue</code></span></p></td>
 103 <td><p>command queue to perform the operation</p></td>
 104 </tr>
 105 <tr>
 106 <td><p><span class="term"><code class="computeroutput">value</code></span></p></td>
 107 <td><p>seed value for the random-number generator </p></td>
 108 </tr>
 109 </tbody>
 110 </table></div></td>
 111 </tr></tbody>
 112 </table></div>
 113 </li>
 114 <li class="listitem">
 115 <pre class="literallayout"><span class="keyword">void</span> <a name="idm46009691780000-bb"></a><span class="identifier">seed</span><span class="special">(</span><span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>
 116 <p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p>
 117 </li>
 118 <li class="listitem">
 119 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">&gt;</span>
 120   <span class="keyword">void</span> <a name="idm46009691777920-bb"></a><span class="identifier">generate</span><span class="special">(</span><span class="identifier">OutputIterator</span> first<span class="special">,</span> <span class="identifier">OutputIterator</span> last<span class="special">,</span>
 121                 <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>Generates random numbers and stores them to the range [<code class="computeroutput">first</code>, <code class="computeroutput">last</code>). </li>
 122 <li class="listitem">
 123 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> OutputIterator<span class="special">,</span> <span class="keyword">typename</span> Function<span class="special">&gt;</span>
 124   <span class="keyword">void</span> <a name="idm46009691772944-bb"></a><span class="identifier">generate</span><span class="special">(</span><span class="identifier">OutputIterator</span> first<span class="special">,</span> <span class="identifier">OutputIterator</span> last<span class="special">,</span> <span class="identifier">Function</span> op<span class="special">,</span>
 125                 <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>
 126 <p>Generates random numbers, transforms them with <code class="computeroutput">op</code>, and then stores them to the range [<code class="computeroutput">first</code>, <code class="computeroutput">last</code>). </p>
 127 </li>
 128 <li class="listitem">
 129 <pre class="literallayout"><span class="keyword">void</span> <a name="idm46009691766128-bb"></a><span class="identifier">discard</span><span class="special">(</span><span class="identifier">size_t</span> z<span class="special">,</span> <span class="identifier">command_queue</span> <span class="special">&amp;</span> queue<span class="special">)</span><span class="special">;</span></pre>Generates <code class="computeroutput">z</code> random numbers and discards them. </li>
 130 </ol></div>
 131 </div>
 132 <div class="refsect2">
 133 <a name="idm46113316298080"></a><h3>
 134 <a name="idm46009691751904-bb"></a><code class="computeroutput">threefry_engine</code> private member functions</h3>
 135 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><pre class="literallayout"><span class="keyword">void</span> <a name="idm46009691751328-bb"></a><span class="identifier">load_program</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li></ol></div>
 136 </div>
 137 </div>
 138 </div>
 139 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 140 <td align="left"></td>
 141 <td align="right"><div class="copyright-footer">Copyright &#169; 2013, 2014 Kyle Lutz<p>
 142         Distributed under the Boost Software License, Version 1.0. (See accompanying
 143         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>)
 144       </p>
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