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    <title>clEnqueueReleaseEGLObjectsKHR</title>
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    <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="clEnqueueReleaseEGLObjectsKHR"></a>
        <h1>clEnqueueReleaseEGLObjectsKHR</h1>
        <p>
            Release OpenCL memory objects that have been created from EGL 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="scalarDataTypes.html" target="pagedisplay">cl_int</a>

                    <strong class="fsfunc">
                        clEnqueueReleaseEGLObjectsKHR
                    </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">command_queue</code>
                </span>
            </dt>
            <dd>
              <p>
                        A valid command-queue.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname">num_objects</code>
                </span>
            </dt>
            <dd>
              <p>
                        The number of memory objects to be acquired 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 EGL 
                        resources, within the context associated with 
                        <code class="varname">command_queue</code>.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname">event_wait_list</code>
                , </span>
              <span class="term">
                    <code class="varname">num_events_in_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_wait_list</code> act 
                        as synchronization points.
                    </p>
            </dd>
            <dt>
              <span class="term">
                    <code class="varname">event</code>
                </span>
            </dt>
            <dd>
              <p>
                      Returns an event object that identifies
                      this command and can be used to query or queue a wait for the 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.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
            This function is used to release OpenCL memory objects 
            that have been created from EGL resources. The EGL 
            objects are released by the OpenCL context associated 
            with <code class="varname">command_queue</code>.
        </p>
        <p>
            OpenCL memory objects created from EGL resources which have been acquired by OpenCL 
            must be released by OpenCL before they may be accessed by EGL or by EGL client APIs. 
        </p>
        <p>
            Accessing a EGL 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>
      </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. If
          <code class="varname">num_objects</code> is 0 and <code class="varname">mem_objects</code> is NULL 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> &gt; 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
              in the context associated with <code class="varname">command_queue</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_EGL_OBJECT_KHR</span> if memory objects in
              <code class="varname">mem_objects</code> have not been 
              created from EGL 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_EVENT_WAIT_LIST</span>
              if <code class="varname">event_wait_list</code> is NULL and
              <code class="varname">num_events_in_wait_list</code> &gt; 0,
              or <code class="varname">event_wait_list</code> is not NULL and
              <code class="varname">num_events_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_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>
          </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-extensions.pdf#page=170" 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_egl_image.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_egl_image</span></span></a>,
            <a class="citerefentry" href="cl_khr_egl_event.html"><span class="citerefentry"><span class="refentrytitle">cl_khr_egl_event</span></span></a>,
            <a class="citerefentry" href="clEnqueueAcquireEGLObjectsKHR.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueAcquireEGLObjectsKHR</span></span></a>,
            <a class="citerefentry" href="clCreateFromEGLImageKHR.html"><span class="citerefentry"><span class="refentrytitle">clCreateFromEGLImageKHR</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
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