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    <title>async_work_group_copy</title>
    <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" />
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    <div class="refentry">
      <a id="id-1"></a>
      <div class="titlepage"></div>
      <div xmlns="" class="refnamediv">
        <a xmlns="http://www.w3.org/1999/xhtml" id="async_work_group_copy"></a>
        <h1>async_work_group_copy</h1>
        <p>
            Perform an async copy.
        </p>
      </div>
      <div class="refsynopsisdiv">
        <h2></h2>
        <div class="funcsynopsis">
          <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0">
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              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a>
                    <strong class="fsfunc">
                        async_work_group_copy
                    </strong>
                (</code>
                <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="pagedisplay">__local</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst</var>, </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="pagedisplay">__global</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*src</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_gentypes</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">event</var><code>)</code></td>
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                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <a class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a>
                    <strong class="fsfunc">
                        async_work_group_copy
                    </strong>
                (</code>
                <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="global.html" target="pagedisplay">__global</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst</var>, </td>
              </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td>const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="local.html" target="pagedisplay">__local</a> gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*src</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_gentypes</var>, </td>
            </tr>
            <tr valign="top">
              <td> </td>
              <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="pagedisplay">event_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">event</var><code>)</code></td>
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      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
          The OpenCL C programming language implements these functions that provide asynchronous
          copies between global and local memory and a prefetch from global memory.
        </p>
        <p>
          Perform an async copy of <code class="varname">num_gentypes</code> elements from
          <code class="varname">src</code> to <code class="varname">dst</code>. The async copy is performed by all
          work-items in a work-group and this built-in function must therefore be encountered
          by all work-items in a work-group executing the kernel with the same argument values;
          otherwise the results are undefined.
        </p>
        <p>
          Returns an event object that can be used by
          <a class="citerefentry" href="wait_group_events.html"><span class="citerefentry"><span class="refentrytitle">wait_group_events</span></span></a> to
          wait for the async copy to finish. The <code class="varname">event</code> argument can also be
          used to associate the <code class="function">async_work_group_copy</code> with a previous
          async copy allowing an event to be shared by multiple async copies; otherwise
          <code class="varname">event</code> should be zero.
        </p>
        <p>
          If <code class="varname">event</code> argument is non-zero, the event object supplied in
          <code class="varname">event</code> argument will be returned.
        </p>
        <p>
          This function does not perform any implicit synchronization of source data such as
          using a <a class="citerefentry" href="barrier.html"><span class="citerefentry"><span class="refentrytitle">barrier</span></span></a> before
          performing the copy.
        </p>
      </div>
      <div class="refsect1">
        <a id="notes"></a>
        <h2>Notes</h2>
        <p>
        The generic type name <span class="type">gentype</span> indicates the built-in data
        types <span class="type">char</span>,  <span class="type">char{2|3|4|8|16}</span>, <span class="type">uchar</span>,
        <span class="type">uchar{2|3|4|8|16}</span>, <span class="type">short</span>, <span class="type">short{2|3|4|8|16}</span>,
        <span class="type">ushort</span>, <span class="type">ushort{2|3|4|8|16}</span>, <span class="type">int</span>,
        <span class="type">int{2|3|4|8|16}</span>, <span class="type">uint</span>, <span class="type">uint{2|3|4|8|16}</span>,
        <span class="type">long</span>, <span class="type">long{2|3|4|8|16}</span>, <span class="type">ulong</span>,
        <span class="type">ulong{2|3|4|8|16}</span> or <span class="type">float</span>, <span class="type">float{2|3|4|8|16}</span>
        as the type for the arguments unless otherwise stated.
      </p>
        <p>
        Optionally, generic type name <span class="type">gentype</span> may indicate <span class="type">double</span>
        and <span class="type">double{2|3|4|8|16}</span> as arguments and return values. If extended with
        <a class="citerefentry" href="cl_khr_fp16.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp16</span></span></a>, generic type
        name <span class="type">gentype</span> may indicate <span class="type">half</span> and <span class="type">half{2|3|4|8|16}</span>
        as arguments and return values.
      </p>
        <p>
        <code class="function">async_work_group_copy</code> and
        <code class="function">async_work_group_strided_copy</code> for 3-component
        vector types behave as <code class="function">async_work_group_copy</code> and
        <code class="function">async_work_group_strided_copy</code> respectively for 4-component vector
        types.
      </p>
      </div>
      <div class="refsect1">
        <a id="specification"></a>
        <h2>Specification</h2>
        <p>
            <img src="pdficon_small1.gif" />

            <a href="http://www.khronos.org/registry/cl/specs/opencl-1.2.pdf#page=276" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="asyncCopyFunctions.html"><span class="citerefentry"><span class="refentrytitle">Async Copy and Prefetch  Functions</span></span></a>,
            <a class="citerefentry" href="wait_group_events.html"><span class="citerefentry"><span class="refentrytitle">wait_group_events</span></span></a>
        </p>
      </div>
      <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2011 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.
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