120 lines
6.1 KiB
HTML
120 lines
6.1 KiB
HTML
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<title>std::pmr::pool_options</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_memory_pool_options skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::pmr::</span>pool_options</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-memory.html">memory</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-memory_resource.html"><memory_resource></a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">struct</span> pool_options<span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<p><code>std::pmr::pool_options</code> 是一组池资源构造函数选项的集合，池资源包含 <span class="t-lc"><a href="cpp-memory-synchronized_pool_resource.html">std::pmr::synchronized_pool_resource</a></span> 和 <span class="t-lc"><a href="cpp-memory-unsynchronized_pool_resource.html">std::pmr::unsynchronized_pool_resource</a></span> 。</p>
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<h3><span class="mw-headline" id=".E6.95.B0.E6.8D.AE.E6.88.90.E5.91.98">数据成员</span></h3>
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<td>成员</td>
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<td>含义</td>
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<div><span class="mw-geshi cpp source-cpp"><a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> max_blocks_per_chunk<span class="sy4">;</span></span></div>
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<td>要一次从上游 <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span> 分配以充满池的块数量最大值。若 <code>max_blocks_per_chunk</code> 的值为零或大于一个实现定义极限，则使用极限代替。实现可以选择使用小于指定于此域的值，并可对不同池使用不同值。</td>
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<div><span class="mw-geshi cpp source-cpp"><a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> largest_required_pool_block<span class="sy4">;</span></span></div>
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<td>要求使用分池机制实现的最大分配大小。分配大于此门槛的单个块的尝试会直接从上游 <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span> 分配。若 <code>largest_required_pool_block</code> 为零或大于实现定义的极限，则使用极限代替。实现可选择大于指定于此域的值的通过门槛。</td>
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<p><br /></p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-memory-synchronized_pool_resource.html"><span class="t-lines"><span>synchronized_pool_resource</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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<td>线程安全的 <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span>，用于管理具有不同块大小的池中的分配<br />
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<span class="t-mark">(类)</span></td>
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<div><a href="cpp-memory-unsynchronized_pool_resource.html"><span class="t-lines"><span>unsynchronized_pool_resource</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
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</td>
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<td>线程不安全的 <span class="t-lc"><a href="cpp-memory-memory_resource.html">std::pmr::memory_resource</a></span>，用于管理具有不同块大小的池中的分配<br />
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<span class="t-mark">(类)</span></td>
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