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    <title>clRetainCommandQueue</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="clRetainCommandQueue"></a>
        <h1>clRetainCommandQueue</h1>
        <p>Increments the <code xmlns="http://www.w3.org/1999/xhtml" class="varname">command_queue</code> reference count.</p>
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                <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"><a class="link" href="scalarDataTypes.html" target="_top">cl_int</a> <strong class="fsfunc">clRetainCommandQueue</strong>(</code>
                <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">cl_command_queue</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">command_queue</var><code>)</code></td>
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      <div class="refsect1">
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        <h2>Parameters</h2>
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            <dt>
              <span class="term">
                <code class="varname">command_queue</code>
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              <p>
                    Specifies the command-queue to retain.
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        <h2>Notes</h2>
        <p>
            <code class="function">clCreateCommandQueue</code> performs an implicit retain. This is very helpful for 3rd party libraries, which typically get a command-queue passed to them by the application. However, it is possible that the application may delete the command-queue without informing the library. Allowing functions to attach to (i.e. retain) and release a command-queue solves the problem of a command-queue being used by a library no longer being valid.
		</p>
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        <h2>Errors</h2>
        <p>
		Returns <span class="errorname">CL_SUCCESS</span> if the function is executed successfully. It returns <span class="errorname">CL_INVALID_COMMAND_QUEUE</span> if <code class="varname">command_queue</code> is not a valid command-queue.
		</p>
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        <h2>Specification</h2>
        <p><img src="pdficon_small1.gif" />
            <a href="http://www.khronos.org/registry/cl/specs/opencl-1.x-latest.pdf#page=47" target="OpenCL Spec">OpenCL Specification</a>
        </p>
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        <h2>Also see</h2>
        <p>
			<a class="citerefentry" href="clCreateCommandQueue.html"><span class="citerefentry"><span class="refentrytitle">clCreateCommandQueue</span></span></a>, 
			<a class="citerefentry" href="clGetCommandQueueInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetCommandQueueInfo</span></span></a>, 
			<a class="citerefentry" href="clReleaseCommandQueue.html"><span class="citerefentry"><span class="refentrytitle">clReleaseCommandQueue</span></span></a>, 
			<a class="citerefentry" href="clSetCommandQueueProperty.html"><span class="citerefentry"><span class="refentrytitle">clSetCommandQueueProperty</span></span></a>         
		</p>
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    Copyright © 2007-2009 The Khronos Group Inc. 
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