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<title>clEnqueueReleaseD3D10ObjectsKHR</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1" />
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<body>
<div class="refentry">
<a id="idm1"></a>
<div class="titlepage"></div>
<div xmlns="" class="refnamediv">
<a xmlns="http://www.w3.org/1999/xhtml" id="clEnqueueReleaseD3D10ObjectsKHR"></a>
<h1>clEnqueueReleaseD3D10ObjectsKHR</h1>
<p>Release OpenCL memory objects that have been created from Direct3D 10 resources.</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="abstractDataTypes.html" target="pagedisplay">cl_int</a>
<strong class="fsfunc">clEnqueueReleaseD3D10ObjectsKHR</strong>(</code>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_command_queue</a>
<var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">command_queue</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">num_objects</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>const <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">*mem_objects</var>, </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">num_events_in_wait_list</var>, </td>
</tr>
<tr valign="top">
<td> </td>
<td>
const <a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event_wait_list</var>
, </td>
</tr>
<tr valign="top">
<td> </td>
<td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="pagedisplay">cl_event</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*event</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">num_objects</code>
</span>
</dt>
<dd>
<p>
The number of memory objects to be released in <code class="varname">mem_objects</code>.
</p>
</dd>
<dt>
<span class="term">
<code class="varname">mem_objects</code>
</span>
</dt>
<dd>
<p>
A pointer to a list of OpenCL memory objects that were created from
Direct3D 10 resources.
</p>
</dd>
<dt>
<span class="term"><code class="varname">num_events_in_wait_list</code>, <code class="varname">event_wait_list</code></span>
</dt>
<dd>
<p>
Specify events that need to complete before this particular
command can be executed. If <code class="varname">event_wait_list</code>
is NULL, then this particular command does not wait on any
event to complete. If <code class="varname">event_wait_list</code> is
NULL, <code class="varname">num_events_in_wait_list</code> must be 0. If
<code class="varname">event_wait_list</code> is not NULL, the list of events
pointed to by <code class="varname">event_wait_list</code> must be valid and
<code class="varname">num_events_in_wait_list</code> must be greater than 0.
The events specified in <code class="varname">event</code> returns an event object
that identifies this particular command and can be used to query or queue a
wait for this particular command to complete. <code class="varname">event</code> can
be NULL in which case it will not be possible for the application to query
the status of this command or queue a wait for this command to complete.
If the <code class="varname">event_wait_list</code> and the <code class="varname">event</code>
arguments are not NULL, the <code class="varname">event</code> argument should not
refer to an element of the <code class="varname">event_wait_list</code> array.
</p>
</dd>
</dl>
</div>
</div>
<div class="refsect1">
<a id="notes"></a>
<h2>Notes</h2>
<p>
The Direct3D 10 objects are released by the OpenCL context associated with
<code class="varname">command_queue</code>.
</p>
<p>
OpenCL memory objects created from Direct3D 10 resources which have been acquired
by OpenCL must be released by OpenCL before they may be accessed by Direct3D 10.
Accessing a Direct3D 10 resource while its corresponding OpenCL memory object is
acquired is in error and will result in undefined behavior, including but not limited
to possible OpenCL errors, data corruption, and program termination.
</p>
<p>
If <code class="constant">CL_CONTEXT_INTEROP_USER_SYNC</code> is not
specified as <code class="constant">CL_TRUE</code> during context creation,
<code class="function">clEnqueueReleaseD3D10ObjectsKHR</code> provides the
synchronization guarantee that any calls to Direct3D 10 calls involving
the interop device(s) used in the OpenCL context made after the call to
<code class="function">clEnqueueReleaseD3D10ObjectsKHR</code> will not start executing until
after all events in <code class="varname">event_wait_list</code> are complete and all work already
submitted to <code class="varname">command_queue</code> completes execution. If the context was
created with properties specifying <code class="constant">CL_CONTEXT_INTEROP_USER_SYNC</code>
as <code class="constant">CL_TRUE</code>, the user is responsible for guaranteeing that any
Direct3D 10 calls involving the interop device(s) used in the OpenCL context made
after <code class="function">clEnqueueReleaseD3D10ObjectsKHR</code> will not start executing
until after event returned by <code class="function">clEnqueueReleaseD3D10ObjectsKHR</code>
reports completion.
</p>
<p>
General information about sharing memory objects with Direct3D 10 follows.
</p>
<p>
The goal of this extension is to provide
interoperability between OpenCL and Direct3D 10. This is designed to function
analogously to the OpenGL interoperability. If this extension is supported
by an implementation, the string "cl_khr_d3d10_sharing" will be present in the
<code class="constant">CL_PLATFORM_EXTENSIONS</code> or <code class="constant">CL_DEVICE_EXTENSIONS</code>
string described in the table of allowed values for <code class="varname">param_name</code> for
<a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a>.
</p>
<p>
As currently proposed, the interfaces for this
extension would be provided in cl_d3d10.h.
</p>
<p>
This section discusses OpenCL functions that allow
applications to use Direct3D 10 resources as OpenCL memory objects. This allows efficient
sharing of data between OpenCL and Direct3D 10. The OpenCL API may be used to execute
kernels that read and/or write memory objects that are also Direct3D 10 resources. An
OpenCL image object may be created from a Direct3D 10 texture resource. An OpenCL buffer
object may be created from a Direct3D 10 buffer resource. OpenCL memory objects may be
created from Direct3D 10 objects if and only if the OpenCL context has been created from
a Direct3D 10 device.
</p>
<h4><a id="idm97"></a>Lifetime of Shared Objects</h4>
<p>
An OpenCL memory object created from a Direct3D
10 resource remains valid as long as the corresponding Direct3D 10 resource has not been
deleted. If the Direct3D 10 resource is deleted through the Direct3D 10 API, subsequent
use of the OpenCL memory object will result in undefined behavior, including but not
limited to possible OpenCL errors, data corruption, and program termination.
</p>
<p>
The successful creation of a
cl_context against a Direct3D 10 device specified via the context create parameter
<code class="constant">CL_CONTEXT_D3D10_DEVICE_KHR</code> will increment the internal Direct3D
reference count on the specified Direct3D 10 device. The internal Direct3D reference
count on that Direct3D 10 device will be decremented when the OpenCL reference count on
the returned OpenCL context drops to zero.
</p>
<p>
The OpenCL context and corresponding command-queues
are dependent on the existence of the Direct3D 10 device from which the OpenCL context
was created. If the Direct3D 10 device is deleted through the Direct3D 10 API, subsequent
use of the OpenCL context will result in undefined behavior, including but not limited
to possible OpenCL errors, data corruption, and program termination.
</p>
</div>
<div class="refsect1">
<a id="errors"></a>
<h2>Errors</h2>
<p>
Returns <span class="errorname">CL_SUCCESS</span> returns <span class="errorname">CL_SUCCESS</span>
if the function is executed successfully. If <<code class="varname">num_objects</code>>
is 0 and <<code class="varname">mem_objects</code>> is NULL then the function does
nothing and returns <span class="errorname">CL_SUCCESS</span>. 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">num_objects</code>
is zero and <code class="varname">mem_objects</code> is not a NULL value or if
<code class="varname">num_objects</code> > 0 and <code class="varname">mem_objects</code> is NULL.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_MEM_OBJECT</span> if memory objects in
<code class="varname">mem_objects</code> are not valid OpenCL memory objects or if memory
objects in <code class="varname">mem_objects</code> have not been created from Direct3D
10 resources.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_COMMAND_QUEUE</span> if <code class="varname">command_queue</code>
is not a valid command-queue.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if context associated with
<code class="varname">command_queue</code> was not created from an Direct3D 10 context.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_D3D10_RESOURCE_NOT_ACQUIRED_KHR</span> if
memory objects in mem_objects have not previously been acquired using
<code class="function">clEnqueueAcquireD3D10ObjectsKHR</code>, or have been released using
<code class="function">clEnqueueReleaseD3D10ObjectsKHR</code> since the last time that
they were acquired.
</li>
<li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EVENT_WAIT_LIST</span>
if <code class="varname">event_wait_list</code> is NULL and
<code class="varname">num_event_in_wait_list</code> > 0,
or <code class="varname">event_wait_list</code> is not NULL and
<code class="varname">num_event_in_wait_list</code> is 0, or if event objects in
<code class="varname">event_wait_list</code> are not valid events.
</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>
</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-extensions.pdf#page=79" target="OpenCL Spec">OpenCL Specification</a>
</p>
</div>
<div class="refsect1">
<a id="seealso"></a>
<h2>Also see</h2>
<p>
<a class="citerefentry" href="cl_khr_d3d10_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d10_sharing</span></span></a>,
<a class="citerefentry" href="clGetDeviceIDsFromD3D10KHR.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceIDsFromD3D10KHR</span></span></a>,
<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>,
<a class="citerefentry" href="clCreateFromD3D10Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D10Texture3DKHR</span></span></a>,
<a class="citerefentry" href="clEnqueueAcquireD3D10ObjectsKHR.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueAcquireD3D10ObjectsKHR</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
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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