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<!-- ================================ SYNOPSIS -->
<refnamediv id="clGetExtensionFunctionAddress">
Returns the address of the extension function named by <varname>funcname</varname>.
<refsynopsisdiv xmlns:xlink=""><title></title>
<!-- ================================ PARAMETERS -->
<refsect1 id="parameters">
<varname> <!-- parameter name -->
<para> <!-- parameter description -->
Name of an extension function.
<!-- ================================ DESCRIPTION -->
<refsect1 id="description"><title>Description</title>
The macro <function>clGetExtensionFunctionAddress</function>
returns the address of the extension function named by <varname>funcname</varname>. 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
<function>clGetExtensionFunctionAddress</function> does not guarantee that an extension function is actually supported. The application must also make a corresponding query using
<citerefentry><refentrytitle>clGetPlatformInfo</refentrytitle></citerefentry>(platform, <constant>CL_PLATFORM_EXTENSIONS</constant>, ... ) or <citerefentry><refentrytitle>clGetDeviceInfo</refentrytitle></citerefentry>(device,
<constant>CL_DEVICE_EXTENSIONS</constant>, ... ) to determine if an extension is supported by the OpenCL
<function>clGetExtensionFunctionAddress</function> may not be queried for core (non-extension) functions in OpenCL. For functions that are queryable with <function>clGetExtensionFunctionAddress</function>,
implementations may choose to also export those functions statically from the object libraries
implementing those functions. However, portable applications cannot rely on this behavior.
<!-- ================================ NOTES -->
<refsect1 id="notes"><title>Notes</title>
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.
<!-- ================================ EXAMPLE -->
<refsect2 id="example1">
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Example goes here - it will be set in "code" type with white space preserved.
<!-- ================================ SPECIFICATION -->
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<refsect1 id="specification"><title>Specification</title>
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<olink uri="clGetExtensionFunctionAddress">OpenCL Specification</olink>
<!-- ================================ ALSO SEE -->
<refsect1 id="seealso"><title>Also see</title>
<!-- ============================== COPYRIGHT -->
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<refsect3 id="Copyright"><title></title>
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