sdk/1.0/docs/man/xhtml/clGetExtensionFunctionAddress.html

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    <title>clGetExtensionFunctionAddress</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="clGetExtensionFunctionAddress"></a>
        <h1>clGetExtensionFunctionAddress</h1>
        <p>
            Returns the address of the extension function named by <code xmlns="http://www.w3.org/1999/xhtml" class="varname">funcname</code>.
        </p>
      </div>
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        <h2></h2>
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              <td>
                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef">
                    <strong class="fsfunc">                   
                        clGetExtensionFunctionAddress
                    </strong>
                (</code>
                <td> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">funcname</var><code>)</code></td>
              </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"> 
                        funcname
                    </code>
                </span>
            </dt>
            <dd>
              <p> 
                        Name of an extension function.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
The macro <code class="function">clGetExtensionFunctionAddress</code>
returns the address of the extension function named by <code class="varname">funcname</code>. The pointer returned should be cast to a function pointer type matching the extension function's definition defined in the
appropriate extension specification and header file. A return value of NULL indicates that the
specified function does not exist for the implementation. A non-NULL return value for
<code class="function">clGetExtensionFunctionAddress</code> does not guarantee that an extension function is actually supported. The application must also make a corresponding query using
<a class="citerefentry" href="clGetPlatformInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetPlatformInfo</span></span></a>(platform, <code class="constant">CL_PLATFORM_EXTENSIONS</code>, ... ) or <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a>(device,
<code class="constant">CL_DEVICE_EXTENSIONS</code>, ... ) to determine if an extension is supported by the OpenCL
implementation.
		</p>
        <p>
<code class="function">clGetExtensionFunctionAddress</code> may not be queried for core (non-extension) functions in OpenCL. For functions that are queryable with <code class="function">clGetExtensionFunctionAddress</code>,
implementations may choose to also export those functions statically from the object libraries
implementing those functions. However, portable applications cannot rely on this behavior.
        </p>
      </div>
      <div class="refsect1">
        <a id="notes"></a>
        <h2>Notes</h2>
        <p>
  Since there is no way to qualify the query with a device, the function pointer returned must work for all implementations of that extension on different devices. The behavior of calling a device extension function on a device not supporting that extension is undefined.
        </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=224" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="EXTENSION.html"><span class="citerefentry"><span class="refentrytitle">EXTENSION</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
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