87 lines
6.3 KiB
HTML
87 lines
6.3 KiB
HTML
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<title>std::pmr::unsynchronized_pool_resource::unsynchronized_pool_resource</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::pmr::unsynchronized_pool_resource::</span>unsynchronized_pool_resource</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-memory.html">memory</a>‎ | <a href="cpp-memory-unsynchronized_pool_resource.html">unsynchronized pool resource</a></span></div>
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<div><span class="mw-geshi cpp source-cpp">unsynchronized_pool_resource<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> unsynchronized_pool_resource<span class="br0">(</span><a href="cpp-memory-memory_resource.html"><span class="kw708">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">memory_resource</span></span></a><span class="sy2">*</span> upstream<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> unsynchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> <a href="cpp-memory-pool_options.html"><span class="kw709">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">pool_options</span></span></a><span class="sy3">&</span> opts<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">unsynchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> <a href="cpp-memory-pool_options.html"><span class="kw709">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">pool_options</span></span></a><span class="sy3">&</span> opts,<br />
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<a href="cpp-memory-memory_resource.html"><span class="kw708">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">memory_resource</span></span></a><span class="sy2">*</span> upstream<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(4)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">unsynchronized_pool_resource<span class="br0">(</span><span class="kw4">const</span> unsynchronized_pool_resource<span class="sy3">&</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span></span></div>
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<td>(5)</td>
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<td><span class="t-mark-rev t-since-cxx17">(C++17 起)</span></td>
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<p>构造一个 <code>unsynchronized_pool_resource</code> 。</p>
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<div class="t-li1"><span class="t-li">1-4)</span> 用指定的上游 memory_resource 构造一个 <code>unsynchronized_pool_resource</code> 并根据指定的选项调节。结果对象保有 <code>upstream</code> 的副本但不占有 <code>upstream</code> 所指向的资源。<br />
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不将 <code>opts</code> 接收为参数的重载以默认构造的 <a href="cpp-memory-pool_options.html"><tt>pool_options</tt></a> 实例为选项。不将 <code>upstream</code> 作为参数接收的重载以 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-memory-get_default_resource.html"><span class="kw715">std::<span class="me2">pmr</span><span class="sy4">::</span><span class="me2">get_default_resource</span></span></a><span class="br0">(</span><span class="br0">)</span></span></span> 的返回值为上游 memory_resource 。</div>
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<div class="t-li1"><span class="t-li">5)</span> 复制构造函数被删除。</div>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<td>opts</td>
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<td>-</td>
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<td>含有构造函数选项的 <span class="t-lc"><a href="cpp-memory-pool_options.html">std::pmr::pool_options</a></span> 结构体</td>
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<td>upstream</td>
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<td>-</td>
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<td>所用的上游 memory_resource</td>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<div class="t-li1"><span class="t-li">1-4)</span> 仅若上游资源的 <code>allocate()</code> 函数抛出异常才抛出。这种调用在何种条件下发生或是否发生是未指定的。</div>
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