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‎lang/cpp26.html‎

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<p class="text-right"><small>
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最終更新日時(UTC):
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<span itemprop="datePublished" content="2025-09-22T08:59:17">
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2025年09月22日 08時59分17秒
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<span itemprop="datePublished" content="2025-10-10T04:00:13">
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2025年10月10日 04時00分13秒
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</li>
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<li><code><a href="../reference/atomic/atomic.html">std::atomic</a></code>クラスと<code><a href="../reference/atomic/atomic_ref.html">std::atomic_ref</a></code>クラスに、現在の値を読み込まず (fetchせず) に加算などをする高速な縮約用の操作として、以下を追加<ul>
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<li>メンバ関数<ul>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic/store_add.md.nolink">store_add()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic/store_sub.md.nolink">store_sub()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic/store_and.md.nolink">store_and()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic/store_or.md.nolink">store_or()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic/store_xor.md.nolink">store_xor()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic/store_max.md.nolink">store_max()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic/store_min.md.nolink">store_min()</span></code></li>
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<li><code><a href="../reference/atomic/atomic/store_add.html">store_add()</a></code></li>
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<li><code><a href="../reference/atomic/atomic/store_sub.html">store_sub()</a></code></li>
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<li><code><a href="../reference/atomic/atomic/store_and.html">store_and()</a></code></li>
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<li><code><a href="../reference/atomic/atomic/store_or.html">store_or()</a></code></li>
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<li><code><a href="../reference/atomic/atomic/store_xor.html">store_xor()</a></code></li>
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<li><code><a href="../reference/atomic/atomic/store_max.html">store_max()</a></code></li>
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<li><code><a href="../reference/atomic/atomic/store_min.html">store_min()</a></code></li>
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<li><code><a href="../reference/atomic/atomic/store_fmaximum.html">store_fmaximum()</a></code> (浮動小数点数用)</li>
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<li><code><a href="../reference/atomic/atomic/store_fminimum.html">store_fminimum()</a></code> (浮動小数点数用)</li>
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<li><code><a href="../reference/atomic/atomic/store_fmaximum_num.html">store_fmaximum_num()</a></code> (浮動小数点数用)</li>
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<li><code><a href="../reference/atomic/atomic/store_fminimum_num.html">store_fminimum_num()</a></code> (浮動小数点数用)</li>
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</ul>
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</li>
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<li>非メンバ関数<ul>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_add.md.nolink">std::atomic_store_add()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_add_explicit.md.nolink">std::atomic_store_add_explicit()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_sub.md.nolink">std::atomic_store_sub()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_sub_explicit.md.nolink">std::atomic_store_sub_explicit()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_and.md.nolink">std::atomic_store_and()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_and_explicit.md.nolink">std::atomic_store_and_explicit()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_or.md.nolink">std::atomic_store_or()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_or_explicit.md.nolink">std::atomic_store_or_explicit()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_xor.md.nolink">std::atomic_store_xor()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_xor_explicit.md.nolink">std::atomic_store_xor_explicit()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_max.md.nolink">std::atomic_store_max()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_max_explicit.md.nolink">std::atomic_store_max_explicit()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_min.md.nolink">std::atomic_store_min()</span></code></li>
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<li><code><span href="https://cpprefjp.github.io/reference/atomic/atomic_store_min_explicit.md.nolink">std::atomic_store_min_explicit()</span></code></li>
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<li><code><a href="../reference/atomic/atomic_store_add.html">std::atomic_store_add()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_add_explicit.html">std::atomic_store_add_explicit()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_sub.html">std::atomic_store_sub()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_sub_explicit.html">std::atomic_store_sub_explicit()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_and.html">std::atomic_store_and()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_and_explicit.html">std::atomic_store_and_explicit()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_or.html">std::atomic_store_or()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_or_explicit.html">std::atomic_store_or_explicit()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_xor.html">std::atomic_store_xor()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_xor_explicit.html">std::atomic_store_xor_explicit()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_max.html">std::atomic_store_max()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_max_explicit.html">std::atomic_store_max_explicit()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_min.html">std::atomic_store_min()</a></code></li>
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<li><code><a href="../reference/atomic/atomic_store_min_explicit.html">std::atomic_store_min_explicit()</a></code></li>
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‎reference/atomic.html‎

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<p class="text-right"><small>
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最終更新日時(UTC):
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<span itemprop="datePublished" content="2025-07-25T10:26:24">
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2025年07月25日 10時26分24秒
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<span itemprop="datePublished" content="2025-10-10T04:00:13">
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<span itemprop="author" itemscope itemtype="http://schema.org/Person">
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<span itemprop="name">yoh</span>
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<span itemprop="name">Akira Takahashi</span>
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が更新
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</small></p>
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<h2>アトミック型に対する算術操作</h2>
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<h3>値を読み込んで算術操作</h3>
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<td><code><a href="atomic/atomic_fetch_max.html">atomic_fetch_max</a></code></td>
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<td>最大値取得(function template)</td>
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<td>最大値を設定・取得(function template)</td>
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<td>C++26</td>
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<td><code><a href="atomic/atomic_fetch_max_explicit.html">atomic_fetch_max_explicit</a></code></td>
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<td>メモリオーダーを指定して最大値取得(function template)</td>
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<td>メモリオーダーを指定して最大値を設定・取得(function template)</td>
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<td>C++26</td>
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<td><code><a href="atomic/atomic_fetch_min.html">atomic_fetch_min</a></code></td>
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<td>最小値取得(function template)</td>
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<td>最小値を設定・取得(function template)</td>
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<td>C++26</td>
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<td><code><a href="atomic/atomic_fetch_min_explicit.html">atomic_fetch_min_explicit</a></code></td>
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<td>メモリオーダーを指定して最小値取得(function template)</td>
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<td>メモリオーダーを指定して最小値を設定・取得(function template)</td>
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<td>C++26</td>
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</tr>
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</tbody>
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</table>
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<h3>値を読み込まずに算術操作</h3>
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<table border="1" bordercolor="#888" style="border-collapse:collapse">
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<thead>
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<tr>
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<th>名前</th>
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<th>説明</th>
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<th>対応バージョン</th>
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</tr>
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</thead>
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<tbody>
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<td><code><a href="atomic/atomic_store_add.html">atomic_store_add</a></code></td>
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<td>値を読み込まずに加算(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_add_explicit.html">atomic_store_add_explicit</a></code></td>
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<td>メモリオーダーを指定して値を読み込まずに加算(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_sub.html">atomic_store_sub</a></code></td>
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<td>値を読み込まずに減算(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_sub_explicit.html">atomic_store_sub_explicit</a></code></td>
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<td>メモリオーダーを指定して値を読み込まずに減算(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_and.html">atomic_store_and</a></code></td>
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<td>値を読み込まずにAND演算(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_and_explicit.html">atomic_store_and_explicit</a></code></td>
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<td>メモリオーダーを指定して値を読み込まずにAND演算(function template)</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/atomic_store_or.html">atomic_store_or</a></code></td>
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<td>値を読み込まずにOR演算(function template)</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/atomic_store_or_explicit.html">atomic_store_or_explicit</a></code></td>
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<td>メモリオーダーを指定して値を読み込まずにOR演算(function template)</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/atomic_store_xor.html">atomic_store_xor</a></code></td>
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<td>値を読み込まずにXOR演算(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_xor_explicit.html">atomic_store_xor_explicit</a></code></td>
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<td>メモリオーダーを指定して値を読み込まずにXOR演算(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_max.html">atomic_store_max</a></code></td>
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<td>値を読み込まずに最大値を設定(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_max_explicit.html">atomic_store_max_explicit</a></code></td>
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<td>メモリオーダーを指定して値を読み込まずに最大値を設定(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_min.html">atomic_store_min</a></code></td>
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<td>値を読み込まずに最小値を設定(function template)</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/atomic_store_min_explicit.html">atomic_store_min_explicit</a></code></td>
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<td>メモリオーダーを指定して値を読み込まずに最小値を設定(function template)</td>
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‎reference/atomic/atomic.html‎

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<p class="text-right"><small>
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最終更新日時(UTC):
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<span itemprop="datePublished" content="2025-10-10T04:00:13">
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<td><code><a href="atomic/store_add.html">store_add</a></code></td>
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<td>値を読み込まずに加算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_sub.html">store_sub</a></code></td>
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<td>値を読み込まずに減算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_and.html">store_and</a></code></td>
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<td>値を読み込まずにAND演算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_or.html">store_or</a></code></td>
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<td>値を読み込まずにOR演算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_xor.html">store_xor</a></code></td>
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<td>値を読み込まずにXOR演算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_max.html">store_max</a></code></td>
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<td>値を読み込まずに最大値を設定</td>
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<td>C++26</td>
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<td><code><a href="atomic/store_min.html">store_min</a></code></td>
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<td>値を読み込まずに最小値を設定</td>
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<td>C++26</td>
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<td>インクリメント</td>
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<td>C++11</td>
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<td><code><a href="atomic/store_add.html">store_add</a></code></td>
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<td>値を読み込まずに加算</td>
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<td>C++26</td>
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<td><code><a href="atomic/store_sub.html">store_sub</a></code></td>
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<td>値を読み込まずに減算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_and.html">store_and</a></code></td>
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<td>値を読み込まずにAND演算</td>
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<td>C++26</td>
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<td><code><a href="atomic/store_or.html">store_or</a></code></td>
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<td>値を読み込まずにOR演算</td>
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<td>C++26</td>
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<td><code><a href="atomic/store_xor.html">store_xor</a></code></td>
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<td>値を読み込まずにXOR演算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_max.html">store_max</a></code></td>
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<td>値を読み込まずに最大値を設定</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_min.html">store_min</a></code></td>
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<td>値を読み込まずに最小値を設定</td>
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<td>C++26</td>
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<td><code><a href="atomic/store_fmaximum.html">store_fmaximum</a></code></td>
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<td>値を読み込まずに最大値を設定 (<code>-0.0</code>と<code>+0.0</code>では<code>+0.0</code>、NaNと値ではNaNを返す)</td>
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<td>C++26</td>
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<td>値を読み込まずに最小値を設定 (<code>-0.0</code>と<code>+0.0</code>では<code>-0.0</code>、NaNと値ではNaNを返す)</td>
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<td>C++26</td>
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<td></td>
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<td>値を読み込まずに最大値を設定 (<code>-0.0</code>と<code>+0.0</code>では<code>+0.0</code>、NaNと値では数値を返す)</td>
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<tr>
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<td><code><a href="atomic/store_fminimum_num.html">store_fminimum_num</a></code></td>
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<td>値を読み込まずに最小値を設定 (<code>-0.0</code>と<code>+0.0</code>では<code>-0.0</code>、NaNと値では数値を返す)</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_add.html">store_add</a></code></td>
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<td>値を読み込まずに加算</td>
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<td>C++26</td>
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</tr>
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<td>値を読み込まずに減算</td>
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<td>C++26</td>
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</tr>
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<td><code><a href="atomic/store_max.html">store_max</a></code></td>
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<td>値を読み込まずに最大値を設定</td>
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<td>C++26</td>
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<tr>
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<td><code><a href="atomic/store_min.html">store_min</a></code></td>
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<td>値を読み込まずに最小値を設定</td>
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<td>C++26</td>
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</tr>
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<tr>
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<td><code><a href="atomic/op_increment.html">operator++</a></code></td>
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<td>インクリメント</td>
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<td>C++11</td>

‎reference/atomic/atomic/fetch_and.html‎

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<p>AND演算を行う</p>
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<h2><a class="cpprefjp-defined-word" data-desc="関数等の意味論を構成する要素の1つ。Constraints。関数であればオーバーロード解決に参加するための条件、それ以外であれば受け付ける型の条件">テンプレートパラメータ制約</a></h2>
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<ul>
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<li>(1), (2) :<ul>
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<li>C++17 : <code>std::atomic&lt;T*&gt;</code>の場合、型<code>T</code>がオブジェクト型であること。型<code>T</code>が<code>void*</code>や関数ポインタであってはならない</li>
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</li>
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<li>(1) :<ul>
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<li>C++20 : <code>atomic&lt;T&gt;::is_always_lock_free</code>が<code>true</code>であること</li>
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‎reference/atomic/atomic/fetch_fmaximum.html‎

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<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="k">constexpr</span> <span class="n">T</span>
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<span class="nf">fetch_fmaximum</span><span class="p">(</span><span class="n">difference_type</span> <span class="n">operand</span><span class="p">,</span>
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<span class="n"><a href="../memory_order.html">memory_order</a></span> <span class="n">order</span> <span class="o">=</span> <span class="n"><a href="../memory_order.html">memory_order_seq_cst</a></span>
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<span class="p">)</span> <span class="k">const</span> <span class="k">noexcept</span><span class="p">;</span> <span class="c1">// (1) C++26</span>
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<span class="p">)</span> <span class="k">noexcept</span><span class="p">;</span> <span class="c1">// (1) C++26</span>
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</code></pre></div>
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</p>
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<h2>概要</h2>

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