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<title>clGetKernelInfo</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="clGetKernelInfo"></a>
<h1>
clGetKernelInfo
</h1>
<p>
Returns information about the kernel object.
</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">
<a class="link" href="scalarDataTypes.html" target="pagedisplay">cl_int</a>
<strong class="fsfunc">clGetKernelInfo</strong>
(</code>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_kernel</a>
<var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">kernel</var>
, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="#cl_kernel_info">cl_kernel_info</a>
<var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">param_name</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">param_value_size</var>
, </td>
</tr>
<tr valign="top">
<td> </td>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">void</a>
<var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*param_value</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">*param_value_size_ret</var>
<code>)</code></td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="parameters"></a>
<h2>Parameters</h2>
<div class="variablelist">
<dl class="variablelist">
<dt>
<span class="term"> <code class="varname"> kernel </code> </span>
</dt>
<dd>
<p>
Specifies the kernel object being queried.
</p>
</dd>
<dt>
<span class="term"> <code class="varname"> param_name </code> </span>
</dt>
<dd>
<p>
Specifies the information to query. The list of supported
<code class="varname">param_name</code> types and the information returned in
<code class="varname">param_value</code> by <code class="function">clGetKernelInfo</code>
is described in the table below.
</p>
</dd>
<dt>
<span class="term"> <code class="varname"> param_value </code> </span>
</dt>
<dd>
<p>
A pointer to memory where the appropriate result being queried is returned.
If <code class="varname">param_value</code> is NULL, it is ignored.
</p>
</dd>
<dt>
<span class="term"> <code class="varname"> param_value_size </code> </span>
</dt>
<dd>
<p>
Used to specify the size in bytes of memory pointed to
by <code class="varname">param_value</code>.
This size must be ≥ size of return
type as described in the table below.
</p>
<div class="informaltable">
<a id="cl_kernel_info"></a>
<table class="informaltable" border="1">
<colgroup>
<col align="left" class="col1" />
<col align="left" class="col2" />
<col align="left" class="col3" />
</colgroup>
<thead>
<tr>
<th align="left">cl_kernel_info</th>
<th align="left">Return Type</th>
<th align="left">Info. returned in <code class="varname">param_value</code></th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">
<code class="constant">CL_KERNEL_FUNCTION_NAME</code>
</td>
<td align="left">char[]</td>
<td align="left">
Return the kernel function name.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_KERNEL_NUM_ARGS</code>
</td>
<td align="left">cl_uint</td>
<td align="left">
Return the number of arguments to <code class="varname">kernel</code>.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_KERNEL_REFERENCE_COUNT</code>
</td>
<td align="left">cl_uint</td>
<td align="left">
<p>
Return the <code class="varname">kernel</code> reference count.
</p>
<p>
The reference count returned should be considered
immediately stale. It is unsuitable for general use
in applications. This feature is provided for identifying memory leaks.
</p>
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_KERNEL_CONTEXT</code>
</td>
<td align="left">cl_context</td>
<td align="left">
Return the context associated with <code class="varname">kernel</code>.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_KERNEL_PROGRAM</code>
</td>
<td align="left">cl_program</td>
<td align="left">
Return the program object associated with <code class="varname">kernel</code>.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_KERNEL_ATTRIBUTES</code>
</td>
<td align="left">char[]</td>
<td align="left">
<p>
Returns any attributes specified using the
__<a class="citerefentry" href="attribute.html"><span class="citerefentry"><span class="refentrytitle">attribute</span></span></a>__
qualifier with the kernel function declaration in
the program source. These attributes include those on the
__<a class="citerefentry" href="attribute.html"><span class="citerefentry"><span class="refentrytitle">attribute</span></span></a>__
page and other attributes supported by an implementation.
</p>
<p>
Attributes are returned as they were declared inside
__<a class="citerefentry" href="attribute.html"><span class="citerefentry"><span class="refentrytitle">attribute</span></span></a>__((...)),
with any surrounding whitespace and embedded newlines
removed. When multiple attributes are present, they are
returned as a single, space delimited string.
</p>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
<dt>
<span class="term"> <code class="varname"> param_value_size_ret </code> </span>
</dt>
<dd>
<p>
the actual size in bytes of data copied to <code class="varname">param_value</code>.
If <code class="varname">param_value_size_ret</code> is NULL, it is ignored.
</p>
</dd>
</dl>
</div>
</div>
<div class="refsect1">
<a id="errors"></a>
<h2>Errors</h2>
<p>
Returns <span class="errorname">CL_SUCCESS</span> if the function is executed
successfully. Otherwise, it returns one of the following errors:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">param_name</code> is not
valid, or if size in bytes specified by <code class="varname">param_value_size</code>
is < size of return type as described in the table above and
<code class="varname">param_value</code> is not NULL.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_KERNEL</span> if <code class="varname">kernel</code>
is not a valid kernel object.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there is a failure to
allocate resources required by the
OpenCL implementation on the device.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure
to allocate resources required by the
OpenCL implementation on the host.
</li>
</ul>
</div>
</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=162" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="clCreateKernel.html"><span class="citerefentry"><span class="refentrytitle">clCreateKernel</span></span></a>,
<a class="citerefentry" href="clCreateKernelsInProgram.html"><span class="citerefentry"><span class="refentrytitle">clCreateKernelsInProgram</span></span></a>,
<a class="citerefentry" href="clGetKernelArgInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetKernelArgInfo</span></span></a>,
<a class="citerefentry" href="clRetainKernel.html"><span class="citerefentry"><span class="refentrytitle">clRetainKernel</span></span></a>,
<a class="citerefentry" href="clReleaseKernel.html"><span class="citerefentry"><span class="refentrytitle">clReleaseKernel</span></span></a>,
<a class="citerefentry" href="clSetKernelArg.html"><span class="citerefentry"><span class="refentrytitle">clSetKernelArg</span></span></a>,
<a class="citerefentry" href="clGetKernelWorkGroupInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetKernelWorkGroupInfo</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
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"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
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