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<title>clGetMemObjectInfo</title>
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<meta name="keywords" content=" clGetMemObjectInfo " />
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<body>
<div class="refentry">
<a id="idp44770816"></a>
<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="clGetMemObjectInfo"></a>
<h1>
clGetMemObjectInfo
</h1>
<p>
Get information that is common to all memory objects (buffer and image objects).
</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">clGetMemObjectInfo</strong>
(</code>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_mem</a>
<var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">memobj</var>
, </td>
</td>
</tr>
<tr valign="top">
<td> </td>
<td>
<a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_mem_info" target="pagedisplay">cl_mem_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"> memobj </code> </span>
</dt>
<dd>
<p>
Specifies the memory object being queried.
</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">clGetMemObjectInfo</code> is 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_mem_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_MEM_TYPE</code>
</td>
<td align="left">cl_mem_object_type</td>
<td align="left">
Returns one of the following values:
<p>
<code class="constant">CL_MEM_OBJECT_BUFFER</code>
if <code class="varname">memobj</code> is created with
<a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>
or
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>.
</p>
<p>
cl_image_desc.image_type argument value if
<code class="varname">memobj</code> is created with
<a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a>.
</p>
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_FLAGS</code>
</td>
<td align="left">cl_mem_flags</td>
<td align="left">
Returns the <code class="varname">flags</code> argument value
specified when <code class="varname">memobj</code> is created with
<a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>,
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>,
or
<a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a>.
If <code class="varname">memobj</code> is a sub-buffer the memory
access qualifiers inherited from parent buffer is also
returned
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_SIZE</code>
</td>
<td align="left">size_t</td>
<td align="left">
Return actual size of the data store associated with <code class="varname">memobj</code> in bytes.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_HOST_PTR</code>
</td>
<td align="left">void *</td>
<td align="left">
<p>
If <code class="varname">memobj</code> is created with
<a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>
or
<a class="citerefentry" href="clCreateImage.html"><span class="citerefentry"><span class="refentrytitle">clCreateImage</span></span></a>
and <code class="constant">CL_MEM_USE_HOST_PTR</code> is
specified in <code class="varname">mem_flags</code>, return the
<code class="varname">host_ptr</code> argument value specified when
<code class="varname">memobj</code> is created. Otherwise a NULL
value is returned.
</p>
<p>
If <code class="varname">memobj</code> is created with
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>,
return the <code class="varname">host_ptr</code>
+ <code class="varname">origin</code> value
specified when <code class="varname">memobj</code>
is created. <code class="varname">host_ptr</code>
is the argument value specified to
<a class="citerefentry" href="clCreateBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateBuffer</span></span></a>
and <code class="constant">CL_MEM_USE_HOST_PTR</code> is specified
in <code class="varname">mem_flags</code> for memory object from
which <code class="varname">memobj</code> is created. Otherwise a
NULL value is returned.
</p> </td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_MAP_COUNT</code>
</td>
<td align="left">cl_uint</td>
<td align="left">
Map count. The map count returned should be considered immediately stale. It is
unsuitable for general use in applications. This feature is provided for debugging.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_REFERENCE_COUNT</code>
</td>
<td align="left">cl_uint</td>
<td align="left">
Return <code class="varname">memobj</code> reference count. The reference count returned should
be considered immediately stale. It is unsuitable for general use in
applications. This feature is provided for identifying memory leaks.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_CONTEXT</code>
</td>
<td align="left">cl_context</td>
<td align="left">
Return context specified when memory object is created.
If <code class="varname">memobj</code> is created using
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>, the context
associated with the memory object specified as the <code class="varname">buffer</code> argument to
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a> is returned.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_ASSOCIATED_-
MEMOBJECT</code>
</td>
<td align="left">cl_mem</td>
<td align="left">
Return memory object from which <code class="varname">memobj</code> is created.
<p>
This returns the memory object specified
as <code class="varname">buffer</code> argument to
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>.
</p>
<p>
Otherwise a NULL value is returned.
</p>
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_OFFSET</code>
</td>
<td align="left">size_t</td>
<td align="left">
Return offset if <code class="varname">memobj</code> is a sub-buffer object created using
<a class="citerefentry" href="clCreateSubBuffer.html"><span class="citerefentry"><span class="refentrytitle">clCreateSubBuffer</span></span></a>.
<p>
This returns 0 if <code class="varname">memobj</code> is not a subbuffer object.
</p>
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_D3D10_RESOURCE_KHR</code>
</td>
<td align="left">ID3D10Resource *</td>
<td align="left">
The property being queried (if the
<a class="citerefentry" href="cl_khr_d3d10_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d10_sharing</span></span></a>
extension is enabled). If <code class="varname">memobj</code> was created using
<a class="citerefentry" href="clCreateFromD3D10BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10BufferKHR</span></span></a>,
<a class="citerefentry" href="clCreateFromD3D10Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture2DKHR</span></span></a>,
or <a class="citerefentry" href="clCreateFromD3D10Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture3DKHR</span></span></a>,
returns the <code class="varname">resource</code> argument specified
when <code class="varname">memobj</code> was created.
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_DX9_MEDIA_-
ADAPTER_TYPE_KHR</code>
</td>
<td align="left">cl_dx9_media_-
adapter_type_khr</td>
<td align="left">
Returns the <span class="type">cl_dx9_media_adapter_type_khr</span> argument
value specified when <code class="varname">memobj</code> is created using
<a class="citerefentry" href="clCreateFromDX9MediaSurfaceKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromDX9MediaSurfaceKHR</span></span></a>
(If the <a class="citerefentry" href="cl_khr_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a>
extension is supported)</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_DX9_MEDIA_-
SURFACE_INFO_KHR</code>
</td>
<td align="left">cl_dx9_-
surface_info_khr</td>
<td align="left">
Returns the cl_dx9_surface_info_khr
argument value specified when <code class="varname">memobj</code> is created using
<a class="citerefentry" href="clCreateFromDX9MediaSurfaceKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromDX9MediaSurfaceKHR</span></span></a>
(If the <a class="citerefentry" href="cl_khr_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a>
extension is supported)
</td>
</tr>
<tr>
<td align="left">
<code class="constant">CL_MEM_D3D11_RESOURCE_KHR</code>
</td>
<td align="left">ID3D11Resource *</td>
<td align="left">If the cl_khr_d3d11_sharing extension is supported,
If <code class="varname">memobj</code> was created using
<a class="citerefentry" href="clCreateFromD3D11BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11BufferKHR</span></span></a>,
<a class="citerefentry" href="clCreateFromD3D11Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture2DKHR</span></span></a>, or
<a class="citerefentry" href="clCreateFromD3D11Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture3DKHR</span></span></a>,
returns the <code class="varname">resource</code> argument specified when <code class="varname">memobj</code> was created.
</td>
</tr>
</tbody>
</table>
</div>
</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 above.
</p>
</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 being queried by <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_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 < 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_MEM_OBJECT</span> if <code class="varname">memobj</code>
is a not a valid memory object.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there is a failure to
allocate resources required by the
OpenCL implementation on the device.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure to
allocate resources required by the
OpenCL implementation on the host.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_D3D10_RESOURCE_KHR</span> If the
<a class="citerefentry" href="cl_khr_d3d10_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d10_sharing</span></span></a>
extension is enabled and if <code class="varname">param_name</code>
is <code class="constant">CL_MEM_D3D10_RESOURCE_KHR</code>
and <code class="varname">memobj</code> was not created by the function
<a class="citerefentry" href="clCreateFromD3D10BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10BufferKHR</span></span></a>,
<a class="citerefentry" href="clCreateFromD3D10Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture2DKHR</span></span></a>,
or
<a class="citerefentry" href="clCreateFromD3D10Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture3DKHR</span></span></a>.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_DX9_MEDIA_SURFACE_KHR</span>
if <code class="varname">param_name</code> is
<code class="constant">CL_MEM_DX9_MEDIA_SURFACE_INFO_KHR</code>
and <code class="varname">memobj</code> was not created by the function
<a class="citerefentry" href="clCreateFromDX9MediaSurfaceKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromDX9MediaSurfaceKHR</span></span></a>
from a Direct3D9 surface. (If the
<a class="citerefentry" href="cl_khr_dx9_media_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_dx9_media_sharing</span></span></a>
extension is supported)
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_D3D11_RESOURCE_KHR</span>
If the cl_khr_d3d11_sharing extension is supported, if
<code class="varname">param_name</code> is <code class="constant">CL_MEM_D3D11_RESOURCE_KHR</code>
and <code class="varname">memobj</code> was not created by the function
<a class="citerefentry" href="clCreateFromD3D11BufferKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11BufferKHR</span></span></a>,
<a class="citerefentry" href="clCreateFromD3D11Texture2DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture2DKHR</span></span></a>,
or
<a class="citerefentry" href="clCreateFromD3D11Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture3DKHR</span></span></a>."
</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-1.2.pdf#page=125" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="clGetImageInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetImageInfo</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 © 2007-2011 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
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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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in all copies or substantial portions of the Materials.
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