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<title>clIcdGetPlatformIDsKHR</title>
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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="clIcdGetPlatformIDsKHR"></a>
<h1>clIcdGetPlatformIDsKHR</h1>
<p>Obtain the list of platforms accessible through the Khronos ICD Loader.</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">clIcdGetPlatformIDsKHR</strong>
(</code>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">num_entries</var>
, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_platform_id</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*platforms</var>
, </td>
</tr>
<tr valign="top">
<td> </td>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="pagedisplay">cl_uint</a>
 <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*num_platforms</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">num_entries</code>
</span>
</dt>
<dd>
<p>
The number of <span class="type">cl_platform_id</span> entries that can
be added to <code class="varname">platforms</code>. If <code class="varname">platforms</code>
is not NULL, then <code class="varname">num_entries</code> must be greater than zero.
</p>
</dd>
<dt>
<span class="term">
<code class="varname">platforms</code>
</span>
</dt>
<dd>
<p>
Returns a list of OpenCL platforms available for access through the
Khronos ICD Loader. The <span class="type">cl_platform_id</span> values returned in
<code class="varname">platforms</code> are ICD compatible and can be used to
identify a specific OpenCL platform. If the <code class="varname">platforms</code>
argument is NULL, then this argument is ignored. The number of
OpenCL platforms returned is the minimum of the value specified by
<code class="varname">num_entries</code> or the number of OpenCL platforms available.
</p>
</dd>
<dt>
<span class="term">
<code class="varname">num_platforms</code>
</span>
</dt>
<dd>
<p>
Returns the number of OpenCL platforms available. If
<code class="varname">num_platforms</code> is NULL, then this argument is ignored.
</p>
</dd>
</dl>
</div>
</div>
<div class="refsect1">
<a id="notes"></a>
<h2>Notes</h2>
<p>
This function is enabled by the
<a class="citerefentry" href="cl_khr_icd.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_icd</span></span></a>
extension.
</p>
</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 and there are a non zero number of platforms available,
else it returns on the errors below:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_PLATFORM_NOT_FOUND_KHR</span> if zero platforms are available.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if <code class="varname">num_entries</code>
is equal to zero and <code class="varname">platforms</code> is not NULL or if both
<code class="varname">num_platforms</code> and <code class="varname">platforms</code> are NULL.
</li>
</ul>
</div>
</div>
<div class="refsect1">
<a id="specification"></a>
<h2>Specification</h2>
<p><img src="pdficon_small1.gif" />
<a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-extensions.pdf#page=130" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="clGetPlatformIDs.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformIDs</span></span></a>,
<a class="citerefentry" href="cl_khr_icd.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_icd</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 © 2007-2015 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
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