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<h1 id="firstHeading" class="firstHeading">atomic_flag_test_and_set, atomic_flag_test_and_set_explicit</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-atomic.html">atomic</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code>&lt;stdatomic.h&gt;</code></div>
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<div><span class="mw-geshi c source-c">_Bool atomic_flag_test_and_set<span class="br0">(</span> <span class="kw4">volatile</span> <a href="c-atomic-atomic_flag.html"><span class="kw917">atomic_flag</span></a><span class="sy2">*</span> obj <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-c11">(C11 &#36215;)</span></td>
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<div><span class="mw-geshi c source-c">_Bool atomic_flag_test_and_set_explicit<span class="br0">(</span> <span class="kw4">volatile</span> <a href="c-atomic-atomic_flag.html"><span class="kw917">atomic_flag</span></a><span class="sy2">*</span> obj, <a href="c-atomic-memory_order.html"><span class="kw910">memory_order</span></a> order <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-c11">(C11 &#36215;)</span></td>
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<p>&#21407;&#23376;&#22320;&#26356;&#25913; <code>obj</code> &#25152;&#25351;&#21521;&#30340; <code>atomic_flag</code> &#30340;&#29366;&#24577;&#20026;&#35774;&#32622;&#65288; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw2">true</span></span></span> &#65289;&#65292;&#24182;&#36820;&#22238;&#20808;&#21069;&#20540;&#12290;&#31532;&#19968;&#29256;&#26412;&#25353; <span class="t-lc"><a href="c-atomic-memory_order.html">memory_order_seq_cst</a></span> &#25490;&#24207;&#20869;&#23384;&#35775;&#38382;&#65292;&#31532;&#20108;&#29256;&#26412;&#25353; <code>order</code> &#25490;&#24207;&#20869;&#23384;&#35775;&#38382;&#12290;</p>
<p>&#21442;&#25968;&#26159;&#20026;&#25351;&#21521; <code>volatile atomic_flag</code> &#30340;&#25351;&#38024;&#65292;&#20197;&#25509;&#21463;&#38750; volatile &#21644; <a href="c-language-volatile.html">volatile</a> &#65288;&#20363;&#22914;&#26144;&#23556;&#21040;&#20869;&#23384;&#30340; I/O &#65289;&#30340; <code>atomic_flag</code> &#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>&#25351;&#21521;&#35201;&#20462;&#25913;&#30340; <code>atomic_flag</code> &#23545;&#35937;&#30340;&#25351;&#38024;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p><code>obj</code> &#25152;&#25351;&#21521;&#30340; <code>atomic_flag</code> &#30340;&#20808;&#21069;&#20540;&#12290;</p>
<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">&#24341;&#29992;</span></h3>
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<li>C11 &#26631;&#20934;&#65288;ISO/IEC 9899:2011&#65289;&#65306;</li>
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<li>7.17.8.1 The atomic_flag_test_and_set functions (p: 285-286)</li>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="c-atomic-atomic_flag_clear.html"><span class="t-lines"><span>atomic_flag_clear</span><span>atomic_flag_clear_explicit</span></span></a></div>
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<td>&#35774;&#32622; <code>atomic_flag</code> &#20026; <code>false</code><br />
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