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| <title>clGetKernelWorkGroupInfo</title> |
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| <div class="refentry"> |
| <a id="idp44769712"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clGetKernelWorkGroupInfo"></a> |
| <h1> |
| clGetKernelWorkGroupInfo |
| </h1> |
| <p> |
| Returns information about the kernel object that may be specific to a device. |
| </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="_top">cl_int</a> |
| <strong class="fsfunc">clGetKernelWorkGroupInfo</strong> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">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="abstractDataTypes.html" target="_top">cl_device_id</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">device</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_kernel_work_group_info" target="_top">cl_kernel_work_group_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="_top">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="_top">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="_top">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"> |
| device |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Identifies a specific device in the list of devices associated with <code class="varname">kernel</code>. The list of devices |
| is the list of devices in the OpenCL context that is associated with <code class="varname">kernel</code>. If the list of devices |
| associated with <code class="varname">kernel</code> is a single device, <code class="varname">device</code> can be a NULL value. |
| </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">clGetKernelWorkGroupInfo</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 greater than or equal to size of return type as described in the table below. |
| </p> |
| <div class="informaltable"> |
| <table 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_work_group_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_WORK_GROUP_SIZE</code> |
| </td> |
| <td align="left">size_t</td> |
| <td align="left"> |
| This provides a mechanism for the |
| application to query the work-group size |
| that can be used to execute a kernel on a |
| specific device given by <code class="varname">device</code>. The |
| OpenCL implementation uses the |
| resource requirements of the kernel |
| (register usage etc.) to determine what |
| this work-group size should be. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_KERNEL_COMPILE_WORK_GROUP_SIZE</code> |
| </td> |
| <td align="left">size_t[3]</td> |
| <td align="left"> |
| Returns the work-group size specified |
| by the |
| <code class="constant">__attribute__((reqd_work_gr |
| oup_size(X, Y, Z)))</code> qualifier. |
| See <a class="citerefentry" href="functionQualifiers.html"><span class="citerefentry"><span class="refentrytitle">Function Qualifiers</span></span></a>. |
| If the work-group size is not specified |
| using the above attribute qualifier (0, 0, |
| 0) is returned. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_KERNEL_LOCAL_MEM_SIZE</code> |
| </td> |
| <td align="left">cl_ulong</td> |
| <td align="left"> |
| <p> |
| Returns the amount of local memory in |
| bytes being used by a kernel. This |
| includes local memory that may be |
| needed by an implementation to execute |
| the kernel, variables declared inside the |
| kernel with the <a class="citerefentry" href="local.html"><span class="citerefentry"><span class="refentrytitle">__local</span></span></a> address |
| qualifier and local memory to be |
| allocated for arguments to the kernel |
| declared as pointers with the <a class="citerefentry" href="local.html"><span class="citerefentry"><span class="refentrytitle">__local</span></span></a> |
| address qualifier and whose size is |
| specified with <a class="citerefentry" href="clSetKernelArg.html"><span class="citerefentry"><span class="refentrytitle">clSetKernelArg</span></span></a>. |
| </p> |
| <p> |
| If the local memory size, for any pointer |
| argument to the kernel declared with the |
| <a class="citerefentry" href="local.html"><span class="citerefentry"><span class="refentrytitle">__local</span></span></a> address qualifier, is not |
| specified, its size is assumed to be 0. |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname"> |
| param_value_size_ret |
| </code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Returns 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_DEVICE</span> if <code class="varname">device</code> is not in the list of devices associated with <code class="varname">kernel</code> or if <code class="varname">device</code> is NULL but there is more than one device associated with <code class="varname">kernel</code>. |
| </li> |
| <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 less than the 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 a not a valid kernel object. |
| </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.x-latest.pdf#page=106" 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="clReleaseKernel.html"><span class="citerefentry"><span class="refentrytitle">clReleaseKernel</span></span></a>, |
| <a class="citerefentry" href="clRetainKernel.html"><span class="citerefentry"><span class="refentrytitle">clRetainKernel</span></span></a>, |
| <a class="citerefentry" href="clSetKernelArg.html"><span class="citerefentry"><span class="refentrytitle">clSetKernelArg</span></span></a>, |
| <a class="citerefentry" href="clGetKernelInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetKernelInfo</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. |
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| copy of this software and/or associated documentation files (the |
| "Materials"), to deal in the Materials without restriction, including |
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