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    <title>clEnqueueTask</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="clEnqueueTask"></a>
        <h1>clEnqueueTask</h1>
        <p>
            Enqueues a command to execute a kernel on a device.
        </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">
                        clEnqueueTask
                    </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="abstractDataTypes.html" target="pagedisplay">cl_kernel</a>
                     <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">kernel</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. The kernel
                      will be queued for execution on the device associated with
                      <code class="varname">command_queue</code>.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> kernel </code> </span>
            </dt>
            <dd>
              <p>
                       A valid kernel object. The
                      OpenCL context associated with <code class="varname">kernel</code> and
                      <code class="varname">command_queue</code> must be the same.
                    </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>
                       Sspecify 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.  The context associated with events in
                      <code class="varname">event_wait_list</code> and <code class="varname">command_queue</code> must
                      be the same. The memory associated with <code class="varname">event_wait_list</code>
                      can be reused or freed after the function returns.
                    </p>
            </dd>
            <dt>
              <span class="term"> <code class="varname"> event </code> </span>
            </dt>
            <dd>
              <p>
                       Returns an event object that identifies
                      this particular kernel execution instance. Event objects are unique and
                      can be used to identify a particular kernel execution instance later on. If
                      <code class="varname">event</code> is NULL, no event will be created for this kernel
                      execution instance and therefore it will not be possible for the application
                      to query or queue a wait for this particular kernel execution instance.
                    </p>
            </dd>
          </dl>
        </div>
      </div>
      <div class="refsect1">
        <a id="notes"></a>
        <h2>Notes</h2>
        <p>
            The kernel is executed using a single work-item.
        </p>
        <p>
          <code class="function">clEnqueueTask</code> is equivalent to calling
          <a class="citerefentry" href="clEnqueueNDRangeKernel.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueNDRangeKernel</span></span></a>
          with <code class="varname">work_dim</code> = 1, <code class="varname">global_work_offset</code>
          = NULL, <code class="varname">global_work_size</code>[0] set to 1, and
          <code class="varname">local_work_size</code>[0] set to 1.
        </p>
      </div>
      <div class="refsect1">
        <a id="errors"></a>
        <h2>Errors</h2>
        <p>
          Returns <span class="errorname">CL_SUCCESS</span> if the kernel execution was successfully
          queued, or one of the errors below:
        </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_PROGRAM_EXECUTABLE</span> if there is no
              successfully built program executable available for device associated with
              <code class="varname">command_queue</code>.
            </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_KERNEL</span> if <code class="varname">kernel</code> is not a
              valid kernel object.
            </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> and <code class="varname">kernel</code> is not the same
              or if the context associated with <code class="varname">command_queue</code> and events in
              <code class="varname">event_wait_list</code> are not the same.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_KERNEL_ARGS</span> if the kernel argument values have
              not been specified.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_WORK_GROUP_SIZE</span> if a work-group size is
              specified for <code class="varname">kernel</code> using the <code class="constant"><a class="citerefentry" href="functionQualifiers.html"><span class="citerefentry"><span class="refentrytitle">__attribute__</span></span></a>
              ((reqd_work_group_size(X, Y, Z)))</code> qualifier in program source and is
              not (<code class="constant">1</code>, <code class="constant">1</code>, <code class="constant">1</code>).
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MISALIGNED_SUB_BUFFER_OFFSET</span> if a sub-buffer object
              is specified as the value for an argument that is a buffer object and the
              <code class="varname">offset</code> specified when the sub-buffer object is created is not
              aligned to <code class="constant">CL_DEVICE_MEM_BASE_ADDR_ALIGN</code> value for device
              associated with <code class="varname">queue</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_IMAGE_SIZE</span> if an image object is specified
              as an argument value and the image dimensions (image width, height, specified
              or compute row and/or slice pitch) are not supported by device associated with
              <code class="varname">queue</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_IMAGE_FORMAT</span> if an image object is specified
              as an argument value and the image format (image channel order and data type)
              is not supported by device associated with <code class="varname">queue</code>.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_RESOURCES</span> if there is a failure to queue the
              execution instance of <code class="varname">kernel</code> on the command-queue because of
              insufficient resources needed to execute the kernel.
            </li>
            <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MEM_OBJECT_ALLOCATION_FAILURE</span> if there is a failure to
              allocate memory for data store associated with image or buffer objects specified
              as arguments to <code class="varname">kernel</code>.
            </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="http://www.khronos.org/registry/cl/specs/opencl-1.2.pdf#page=172" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="clEnqueueNDRangeKernel.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueNDRangeKernel</span></span></a>,
            <a class="citerefentry" href="clEnqueueNativeKernel.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueNativeKernel</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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