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    <title>atomic_flag</title>
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        <a xmlns="http://www.w3.org/1999/xhtml" id="atomic_flag"></a>
        <h1>atomic_flag</h1>
        <p>
            The atomic_flag type provides the classic test-and-set functionality.
        </p>
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      <div class="refsect2">
        <a id="synopsis"></a>
        <h3>
        </h3>
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atomic_flag
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      <div class="refsect1">
        <a id="description"></a>
        <h2>Description</h2>
        <p>
            The <code class="function">atomic_flag</code> type provides the 
            classic test-and-set functionality. It has two states, set 
            (value is non-zero) and clear (value is 0). Operations 
            on an object of type <code class="function">atomic_flag</code> shall 
            be lock free.
        </p>
        <p>
            The macro <code class="constant">ATOMIC_FLAG_INIT</code> may be 
            used to initialize an <code class="function">atomic_flag</code> to the clear 
            state. An <code class="function">atomic_flag</code> that is not 
            explicitly initialized with <code class="constant">ATOMIC_FLAG_INIT</code> is 
            initially in an indeterminate state.
        </p>
        <p>
            This macro can only be used for atomic objects that are 
            declared in program scope in the global 
            address space with the <code class="function">atomic_flag</code> type.
        </p>
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        <h3>
            Example
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global atomic_flag guard = ATOMIC_FLAG_INIT;
                        </td>
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      <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-2.0-openclc.pdf#namedest=atomic_flag" target="OpenCL Spec">OpenCL Specification</a>
        </p>
      </div>
      <div class="refsect1">
        <a id="seealso"></a>
        <h2>Also see</h2>
        <p>
            <a class="citerefentry" href="atomicFunctions.html"><span class="citerefentry"><span class="refentrytitle">Atomic Functions</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.
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