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| <title>clGetKernelArgInfo</title> | |
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| <meta name="keywords" content="clGetKernelArgInfo" /> | |
| </head> | |
| <body> | |
| <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="clGetKernelArgInfo"></a> | |
| <h1> | |
| clGetKernelArgInfo | |
| </h1> | |
| <p> | |
| Returns information about the arguments of a kernel. | |
| </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">clGetKernelArgInfo</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="scalarDataTypes.html" target="pagedisplay">cl_uint</a> | |
| <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">arg_indx</var> | |
| , </td> | |
| </tr> | |
| <tr valign="top"> | |
| <td> </td> | |
| <td> | |
| <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_kernel_arg_info" target="pagedisplay">cl_kernel_arg_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"> arg_indx </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| The argument index. Arguments to the kernel are referred by indices that | |
| go from 0 for the leftmost argument to <code class="varname">n</code> - 1, where | |
| <code class="varname">n</code> is the total number of arguments declared by a kernel. | |
| </p> | |
| </dd> | |
| <dt> | |
| <span class="term"> <code class="varname"> param_name </code> </span> | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies the argument 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">clGetKernelArgInfo</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_arg_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_ARG_ADDRESS_QUALIFIER</code> | |
| </td> | |
| <td align="left">cl_kernel_arg_- | |
| address_qualifier</td> | |
| <td align="left"> | |
| <p> | |
| Returns the address qualifier specified for the | |
| argument given by <code class="varname">arg_indx</code>. | |
| This can be one of the following values: | |
| </p><div class="literallayout"><p><br /> | |
| <code class="constant">CL_KERNEL_ARG_ADDRESS_GLOBAL</code><br /> | |
| <code class="constant">CL_KERNEL_ARG_ADDRESS_LOCAL</code><br /> | |
| <code class="constant">CL_KERNEL_ARG_ADDRESS_CONSTANT</code><br /> | |
| <code class="constant">CL_KERNEL_ARG_ADDRESS_PRIVATE</code><br /> | |
| </p></div><p> | |
| </p> | |
| <p> | |
| If no address qualifier is specified, the default address | |
| qualifier which is <code class="constant">CL_KERNEL_ARG_ADDRESS_PRIVATE</code> is returned. | |
| </p> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td align="left"> | |
| <code class="constant">CL_KERNEL_ARG_ACCESS_QUALIFIER</code> | |
| </td> | |
| <td align="left">cl_kernel_arg_- | |
| access_qualifier</td> | |
| <td align="left"> | |
| <p> | |
| Returns the access qualifier specified for the | |
| argument given by <code class="varname">arg_indx</code>. | |
| This can be one of the following values: | |
| </p><div class="literallayout"><p><br /> | |
| <code class="constant">CL_KERNEL_ARG_ACCESS_READ_ONLY</code><br /> | |
| <code class="constant">CL_KERNEL_ARG_ACCESS_WRITE_ONLY</code><br /> | |
| <code class="constant">CL_KERNEL_ARG_ACCESS_READ_WRITE</code><br /> | |
| <code class="constant">CL_KERNEL_ARG_ACCESS_NONE</code><br /> | |
| </p></div><p> | |
| </p> | |
| <p> | |
| If argument is not an image type | |
| and is not declared with the <code class="code">pipe</code> qualifier, | |
| <code class="constant">CL_KERNEL_ARG_ACCESS_NONE</code> is | |
| returned. If argument is an image type, the access qualifier | |
| specified or the default access qualifier is returned. | |
| </p> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td align="left"> | |
| <code class="constant">CL_KERNEL_ARG_TYPE_NAME</code> | |
| </td> | |
| <td align="left">char[]</td> | |
| <td align="left"> | |
| <p> | |
| Returns the type name specified for the argument given | |
| by <code class="varname">arg_indx</code>. The type name returned | |
| will be the argument type name as it was declared with any | |
| whitespace removed. If argument type name is an unsigned | |
| scalar type (i.e. unsigned char, unsigned short, unsigned | |
| int, unsigned long), uchar, ushort, uint and ulong will | |
| be returned. The argument type name returned does not | |
| include any type qualifiers. | |
| </p> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td align="left"> | |
| <code class="constant">CL_KERNEL_ARG_TYPE_QUALIFIER</code> | |
| </td> | |
| <td align="left">cl_kernel_arg- | |
| type_qualifier</td> | |
| <td align="left"> | |
| <p> | |
| Returns the type qualifier specified for the argument | |
| given by <code class="varname">arg_indx</code>. The returned value | |
| can be: <code class="constant">CL_KERNEL_ARG_TYPE_CONST</code>, | |
| <code class="constant">CL_KERNEL_ARG_TYPE_RESTRICT</code>, | |
| <code class="constant">CL_KERNEL_ARG_TYPE_VOLATILE</code>, | |
| a combination of the above enums, | |
| <code class="constant">CL_KERNEL_ARG_TYPE_PIPE</code> or | |
| <code class="constant">CL_KERNEL_ARG_TYPE_NONE</code>. | |
| </p> | |
| <p> | |
| NOTE: <code class="constant">CL_KERNEL_ARG_TYPE_VOLATILE</code> | |
| is returned if the argument is a pointer and the pointer | |
| is declared with the volatile qualifier. | |
| For example, a kernel argument declared | |
| as <code class="code">global int volatile *x</code> returns | |
| <code class="constant">CL_KERNEL_ARG_TYPE_VOLATILE</code> but | |
| a kernel argument declared as <code class="code">global int * | |
| volatile x</code> does not. Similarly, | |
| <code class="constant">CL_KERNEL_ARG_TYPE_CONST</code> is returned if the | |
| argument is a pointer and the referenced type is | |
| declared with the restrict or const qualifier. For | |
| example, a kernel argument declared as <code class="code">global | |
| int const *x</code> returns | |
| <code class="constant">CL_KERNEL_ARG_TYPE_CONST</code> but | |
| a kernel argument declared as <code class="code">global int * | |
| const x</code> does not. | |
| </p> | |
| <p> | |
| If the argument is declared with the constant address | |
| space qualifier, the | |
| <code class="constant">CL_KERNEL_ARG_TYPE_CONST</code> type qualifier | |
| will be set. | |
| </p> | |
| <p> | |
| <code class="constant">CL_KERNEL_ARG_TYPE_RESTRICT</code> will be returned | |
| if the pointer type is marked restrict. For example, | |
| <code class="code">global int * restrict x</code> returns | |
| <code class="constant">CL_KERNEL_ARG_TYPE_RESTRICT</code>. | |
| </p> | |
| </td> | |
| </tr> | |
| <tr> | |
| <td align="left"> | |
| <code class="constant">CL_KERNEL_ARG_NAME</code> | |
| </td> | |
| <td align="left">char[]</td> | |
| <td align="left"> | |
| <p> | |
| Returns the name specified for the argument given by <code class="varname">arg_indx</code>. | |
| </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="notes"></a> | |
| <h2>Notes</h2> | |
| <p> | |
| Kernel argument information is only available if the program | |
| object associated with <code class="varname">kernel</code> was created with | |
| <a class="citerefentry" href="clCreateProgramWithSource.html"><span class="citerefentry"><span class="refentrytitle">clCreateProgramWithSource</span></span></a> | |
| and the program executable is built with the -cl-kernel-arg-info | |
| option specified in <code class="varname">options</code> argument to | |
| <a class="citerefentry" href="clBuildProgram.html"><span class="citerefentry"><span class="refentrytitle">clBuildProgram</span></span></a> or | |
| <a class="citerefentry" href="clCompileProgram.html"><span class="citerefentry"><span class="refentrytitle">clCompileProgram</span></span></a>. | |
| </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. 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_ARG_INDEX</span> if <code class="varname">arg_indx</code> | |
| is not a valid argument index. | |
| </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 < 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_KERNEL_ARG_INFO_NOT_AVAILABLE</span> if the argument | |
| information is not available for kernel. | |
| </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> | |
| </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.pdf#page=238" 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="clGetKernelInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetKernelInfo</span></span></a>, | |
| <a class="citerefentry" href="clCreateKernelsInProgram.html"><span class="citerefentry"><span class="refentrytitle">clCreateKernelsInProgram</span></span></a>, | |
| <a class="citerefentry" href="clCreateProgramWithSource.html"><span class="citerefentry"><span class="refentrytitle">clCreateProgramWithSource</span></span></a>, | |
| <a class="citerefentry" href="clBuildProgram.html"><span class="citerefentry"><span class="refentrytitle">clBuildProgram</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 © 2007-2015 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 | |
| the condition that this copyright notice and permission notice shall be included | |
| in all copies or substantial portions of the Materials. | |
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