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| <title>clEnqueueReleaseD3D11ObjectsKHR</title> |
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| <div class="refentry"> |
| <a id="idm5850432"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clEnqueueReleaseD3D11ObjectsKHR"></a> |
| <h1>clEnqueueReleaseD3D11ObjectsKHR</h1> |
| <p>Release OpenCL memory objects that have been created from Direct3D 11 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">clEnqueueReleaseD3D11ObjectsKHR</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> |
| <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 11 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 event 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 11 objects are released by the OpenCL context associated with |
| <code class="varname">command_queue</code>. |
| </p> |
| <p> |
| OpenCL memory objects created from Direct3D 11 resources which have been acquired |
| by OpenCL must be released by OpenCL before they may be accessed by Direct3D 11. |
| Accessing a Direct3D 11 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">clEnqueueReleaseD3D11ObjectsKHR</code> provides the |
| synchronization guarantee that any calls to Direct3D 11 calls involving |
| the interop device(s) used in the OpenCL context made after the call to |
| <code class="function">clEnqueueReleaseD3D11ObjectsKHR</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 11 calls involving the interop device(s) used in the OpenCL context made |
| after <code class="function">clEnqueueReleaseD3D11ObjectsKHR</code> will not start executing |
| until after event returned by <code class="function">clEnqueueReleaseD3D11ObjectsKHR</code> |
| reports completion. |
| </p> |
| <p> |
| General information about sharing memory objects with Direct3D 11 follows. |
| </p> |
| <p> |
| The goal of this extension is to provide |
| interoperability between OpenCL and Direct3D 11. This is designed to function analogously |
| to the OpenGL interoperability. If this extension is |
| supported by an implementation, the string |
| <a class="citerefentry" href="cl_khr_d3d11_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d11_sharing</span></span></a> |
| 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 |
| <code class="code">cl_d3d11.h</code>. |
| </p> |
| <p> |
| This section discusses OpenCL functions that allow |
| applications to use Direct3D 11 resources as OpenCL memory objects. This allows efficient |
| sharing of data between OpenCL and Direct3D 11. The OpenCL API may be used to execute |
| kernels that read and/or write memory objects that are also Direct3D 11 resources. An |
| OpenCL image object may be created from a Direct3D 11 texture resource. An OpenCL buffer |
| object may be created from a Direct3D 11 buffer resource. OpenCL memory objects may be |
| created from Direct3D 11 objects if and only if the OpenCL context has been created from |
| a Direct3D 11 device. |
| </p> |
| <p> |
| An OpenCL memory object created from a |
| Direct3D 11 resource remains valid as long as the corresponding Direct3D 11 resource has |
| not been deleted. If the Direct3D 11 resource is deleted through the Direct3D 11 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 11 device specified via the context create parameter |
| <code class="constant">CL_CONTEXT_D3D11_DEVICE_KHR</code> will increment the internal Direct3D |
| reference count on the specified Direct3D 11 device. The internal Direct3D reference |
| count on that Direct3D 11 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 11 device from which the OpenCL context was created. If the |
| Direct3D 11 device is deleted through the Direct3D 11 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> |
| <p> |
| Properties of Direct3D 11 objects may be queried |
| using <a class="citerefentry" href="clGetMemObjectInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetMemObjectInfo</span></span></a> |
| and <a class="citerefentry" href="clGetImageInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetImageInfo</span></span></a> |
| with <code class="varname">param_name</code> <code class="constant">CL_MEM_D3D11_RESOURCE_KHR</code> and |
| <code class="constant">CL_IMAGE_D3D11_SUBRESOURCE_KHR</code> as described for <a class="citerefentry" href="clGetImageInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetImageInfo</span></span></a> and in the information |
| below about accessing mapped regions of a memory object. |
| </p> |
| <h4><a id="idp53104"></a>Accessing mapped regions of a memory object</h4> |
| <p> |
| This section describes the behavior of OpenCL commands that access |
| mapped regions of a memory object. |
| </p> |
| <p> |
| The contents of the region of a memory object and associated memory objects |
| (sub-buffer objects or 1D image buffer objects that overlap this region) mapped |
| for writing (i.e. <code class="constant">CL_MAP_WRITE</code> or |
| <code class="constant">CL_MAP_WRITE_INVALIDATE_REGION</code> is set in <code class="varname">map_flags</code> |
| argument to <a class="citerefentry" href="clEnqueueMapBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapBuffer</span></span></a> |
| or <a class="citerefentry" href="clEnqueueMapImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapImage</span></span></a>) are |
| considered to be undefined until this region is unmapped. |
| </p> |
| <p> |
| Multiple commands in command-queues can map a region or overlapping regions of a memory |
| object and associated memory objects (sub-buffer objects or 1D image buffer objects that |
| overlap this region) for reading (i.e. <code class="varname">map_flags</code> = <code class="constant">CL_MAP_READ</code>). |
| The contents of the regions of a memory object mapped for reading can also be read by kernels |
| and other OpenCL commands (such as |
| <a class="citerefentry" href="clEnqueueCopyBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBuffer</span></span></a>) executing on a device(s). |
| </p> |
| <p> |
| Mapping (and unmapping) overlapped regions in a memory object and/or associated memory |
| objects (sub-buffer objects or 1D image buffer objects that overlap this region) for writing |
| is an error and will result in <code class="constant">CL_INVALID_OPERATION</code> error returned by |
| <a class="citerefentry" href="clEnqueueMapBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapBuffer</span></span></a> |
| or <a class="citerefentry" href="clEnqueueMapImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapImage</span></span></a>. |
| </p> |
| <p> |
| If a memory object is currently mapped for writing, the application must ensure that the memory |
| object is unmapped before any enqueued kernels or commands that read from or write to this |
| memory object or any of its associated memory objects (sub-buffer or 1D image buffer objects) |
| or its parent object (if the memory object is a sub-buffer or 1D image buffer object) begin |
| execution; otherwise the behavior is undefined. |
| </p> |
| <p> |
| If a memory object is currently mapped for reading, the application must ensure that the memory |
| object is unmapped before any enqueued kernels or commands that write to this memory object |
| or any of its associated memory objects (sub-buffer or 1D image buffer objects) or its parent |
| object (if the memory object is a sub-buffer or 1D image buffer object) begin execution; |
| otherwise the behavior is undefined. |
| </p> |
| <p> |
| Accessing the contents of the memory region referred to by the mapped pointer that has |
| been unmapped is undefined. |
| </p> |
| <p> |
| The mapped pointer returned by |
| <a class="citerefentry" href="clEnqueueMapBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapBuffer</span></span></a> |
| or <a class="citerefentry" href="clEnqueueMapImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueMapImage</span></span></a> can be used as |
| <code class="varname">ptr</code> argument value to |
| <a class="citerefentry" href="clEnqueueReadBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadBuffer</span></span></a>, |
| <a class="citerefentry" href="clEnqueueWriteBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteBuffer</span></span></a>, |
| <a class="citerefentry" href="clEnqueueReadBufferRect.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadBufferRect</span></span></a>, |
| <a class="citerefentry" href="clEnqueueWriteBufferRect.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteBufferRect</span></span></a>, |
| <a class="citerefentry" href="clEnqueueReadImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadImage</span></span></a>, and |
| <a class="citerefentry" href="clEnqueueWriteImage.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteImage</span></span></a>, |
| provided the rules described above are adhered to. |
| </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" 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 |
| 11 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 a Direct3D 11 context. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_D3D11_RESOURCE_NOT_ACQUIRED_KHR</span> if memory objects |
| in <code class="varname">mem_objects</code> have not previously been acquired using |
| <code class="function">clEnqueueAcquireD3D11ObjectsKHR</code>, or have been released using |
| <code class="function">clEnqueueReleaseD3D11ObjectsKHR</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=110" 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_d3d11_sharing.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_d3d11_sharing</span></span></a>, |
| <a class="citerefentry" href="clGetDeviceIDsFromD3D11KHR.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceIDsFromD3D11KHR</span></span></a>, |
| <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>, |
| <a class="citerefentry" href="clCreateFromD3D11Texture3DKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromD3D11Texture3DKHR</span></span></a>, |
| <a class="citerefentry" href="clEnqueueAcquireD3D11ObjectsKHR.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueAcquireD3D11ObjectsKHR</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 |
| 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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