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| <title>async_work_group_copy</title> |
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| <body> |
| <div class="refentry"> |
| <a id="idm1"></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"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| event_t |
| <strong class="fsfunc"> |
| async_work_group_copy |
| </strong> |
| (</code> |
| <td>__local gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const __global 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="_top">size_t</a> |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_elements</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="_top">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="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| event_t |
| <strong class="fsfunc"> |
| async_work_group_copy |
| </strong> |
| (</code> |
| <td>__global gentype <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*dst</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td>const __local 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="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_elements</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="otherDataTypes.html" target="_top">event_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">event</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </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_elements</code> |
| <span class="type">gentype</span> 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 workgroup |
| 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 |
| barrier before performing the copy. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="notes"></a> |
| <h2>Notes</h2> |
| <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. |
| </p> |
| <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|4|8|16}</span>, <span class="type">uchar</span>, <span class="type">uchar{2|4|8|16}</span>, <span class="type">short</span>, <span class="type">short{2|4|8|16}</span>, <span class="type">ushort</span>, <span class="type">ushort{2|4|8|16}</span>, <span class="type">int</span>, <span class="type">int{2|4|8|16}</span>, <span class="type">uint</span>, <span class="type">uint{2|4|8|16}</span>, <span class="type">long</span>, <span class="type">long{2|4|8|16}</span>, <span class="type">ulong</span>, <span class="type">ulong{2|4|8|16}</span> or <span class="type">float</span>, <span class="type">float{2|4|8|16}</span> as the type for the arguments unless otherwise stated. |
| </p> |
| <p> |
| If extended with <a class="citerefentry" href="cl_khr_fp64.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_fp64</span></span></a>, generic type name <span class="type">gentype</span> may indicate <span class="type">double</span> and <span class="type">double{2|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|4|8|16}</span> as arguments and return values. |
| </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-1.0.pdf#page=201" 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 © 2007-2009 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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