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  26 <div class="refentry">
  27 <a name="boost.container.pmr.resource_adaptor_imp"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Class template resource_adaptor_imp</span></h2>
  30 <p>boost::container::pmr::resource_adaptor_imp</p>
  31 </div>
  32 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  33 <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../../boost_container_header_reference.html#header.boost.container.pmr.resource_adaptor_hpp" title="Header &lt;boost/container/pmr/resource_adaptor.hpp&gt;">boost/container/pmr/resource_adaptor.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Allocator<span class="special">&gt;</span>
  36 <span class="keyword">class</span> <a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">container</span><span class="special">::</span><span class="identifier">pmr</span><span class="special">::</span><span class="identifier">memory_resource</span> <span class="special">{</span>
  37 <span class="keyword">public</span><span class="special">:</span>
  38   <span class="comment">// types</span>
  39   <span class="keyword">typedef</span> <span class="identifier">Allocator</span> <a name="boost.container.pmr.resource_adaptor_imp.allocator_type"></a><span class="identifier">allocator_type</span><span class="special">;</span>
  40
  41   <span class="comment">// <a class="link" href="resource_adaptor_imp.html#boost.container.pmr.resource_adaptor_impconstruct-copy-destruct">construct/copy/destruct</a></span>
  42   <a class="link" href="resource_adaptor_imp.html#idm45666069872352-bb"><span class="identifier">resource_adaptor_imp</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  43   <a class="link" href="resource_adaptor_imp.html#idm45666069871072-bb"><span class="identifier">resource_adaptor_imp</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  44   <a class="link" href="resource_adaptor_imp.html#idm45666069868656-bb"><span class="identifier">resource_adaptor_imp</span></a><span class="special">(</span><a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
  45   <span class="keyword">explicit</span> <a class="link" href="resource_adaptor_imp.html#idm45666069866400-bb"><span class="identifier">resource_adaptor_imp</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">Allocator</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  46   <span class="keyword">explicit</span> <a class="link" href="resource_adaptor_imp.html#idm45666069864160-bb"><span class="identifier">resource_adaptor_imp</span></a><span class="special">(</span><span class="identifier">Allocator</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
  47   <a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span> <a class="link" href="resource_adaptor_imp.html#idm45666069861920-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  48   <a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span> <a class="link" href="resource_adaptor_imp.html#idm45666069858928-bb"><span class="keyword">operator</span><span class="special">=</span></a><span class="special">(</span><a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
  49
  50   <span class="comment">// <a class="link" href="resource_adaptor_imp.html#idm45666069876736-bb">public member functions</a></span>
  51   <span class="identifier">allocator_type</span> <span class="special">&amp;</span> <a class="link" href="resource_adaptor_imp.html#idm45666069876176-bb"><span class="identifier">get_allocator</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  52   <span class="keyword">const</span> <span class="identifier">allocator_type</span> <span class="special">&amp;</span> <a class="link" href="resource_adaptor_imp.html#idm45666069874480-bb"><span class="identifier">get_allocator</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  53
  54   <span class="comment">// <a class="link" href="resource_adaptor_imp.html#idm45666069856096-bb">protected member functions</a></span>
  55   <span class="keyword">virtual</span> <span class="keyword">void</span> <span class="special">*</span> <a class="link" href="resource_adaptor_imp.html#idm45666069855520-bb"><span class="identifier">do_allocate</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span><span class="special">;</span>
  56   <span class="keyword">virtual</span> <span class="keyword">void</span> <a class="link" href="resource_adaptor_imp.html#idm45666069851168-bb"><span class="identifier">do_deallocate</span></a><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span><span class="special">;</span>
  57   <span class="keyword">virtual</span> <span class="keyword">bool</span> <a class="link" href="resource_adaptor_imp.html#idm45666069846032-bb"><span class="identifier">do_is_equal</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span>
  58
  59   <span class="comment">// <a class="link" href="resource_adaptor_imp.html#idm45666069841984-bb">private member functions</a></span>
  60   <span class="keyword">void</span> <span class="special">*</span> <a class="link" href="resource_adaptor_imp.html#idm45666069841408-bb"><span class="identifier">priv_aligned_alloc</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span><span class="special">;</span>
  61   <span class="keyword">void</span> <a class="link" href="resource_adaptor_imp.html#idm45666069839184-bb"><span class="identifier">priv_aligned_dealloc</span></a><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span><span class="special">;</span>
  62
  63   <span class="comment">// <a class="link" href="resource_adaptor_imp.html#idm45666069836112-bb">private static functions</a></span>
  64   <span class="keyword">static</span> <span class="keyword">void</span> <span class="special">*</span> <a class="link" href="resource_adaptor_imp.html#idm45666069835536-bb"><span class="identifier">priv_bookeeping_addr_from_aligned_ptr</span></a><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
  65   <span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="resource_adaptor_imp.html#idm45666069833712-bb"><span class="identifier">priv_extra_bytes_for_overalignment</span></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span><span class="special">;</span>
  66   <span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a class="link" href="resource_adaptor_imp.html#idm45666069831888-bb"><span class="identifier">priv_guaranteed_allocator_alignment</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  67 <span class="special">}</span><span class="special">;</span></pre></div>
  68 <div class="refsect1">
  69 <a name="id-1.3.10.14.25.3.4"></a><h2>Description</h2>
  70 <p>An instance of resource_adaptor&lt;Allocator&gt; is an adaptor that wraps a <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> interface around Allocator. In order that resource_adaptor&lt;X&lt;T&gt;&gt; and resource_adaptor&lt;X<span style="color: red">&lt;underline&gt;&gt; are the same type for any allocator template X and types T and U, resource_adaptor&lt;Allocator&gt; is rendered as an alias to this class template such that Allocator is rebound to a char value type in every specialization of the class template. The requirements on this class template are defined below. In addition to the Allocator requirements, the parameter to resource_adaptor shall meet the following additional requirements:&lt;/underline&gt;</span></p>
  71 <p><span style="color: red">&lt;underline&gt;<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
  72 <li class="listitem"><p><code class="computeroutput">typename <a class="link" href="../allocator_traits.html" title="Struct template allocator_traits">allocator_traits</a>&lt;Allocator&gt;:: pointer</code> shall be identical to <code class="computeroutput">typename <a class="link" href="../allocator_traits.html" title="Struct template allocator_traits">allocator_traits</a>&lt;Allocator&gt;:: value_type*</code>.</p></li>
  73 <li class="listitem"><p><code class="computeroutput">typename <a class="link" href="../allocator_traits.html" title="Struct template allocator_traits">allocator_traits</a>&lt;Allocator&gt;:: const_pointer</code> shall be identical to <code class="computeroutput">typename <a class="link" href="../allocator_traits.html" title="Struct template allocator_traits">allocator_traits</a>&lt;Allocator&gt;:: value_type const*</code>.</p></li>
  74 <li class="listitem"><p><code class="computeroutput">typename <a class="link" href="../allocator_traits.html" title="Struct template allocator_traits">allocator_traits</a>&lt;Allocator&gt;:: void_pointer</code> shall be identical to <code class="computeroutput">void*</code>.</p></li>
  75 <li class="listitem"><p><code class="computeroutput">typename <a class="link" href="../allocator_traits.html" title="Struct template allocator_traits">allocator_traits</a>&lt;Allocator&gt;:: const_void_pointer</code> shall be identical to <code class="computeroutput">void const*</code>. </p></li>
  76 </ul></div>
  77 &lt;/underline&gt;</span></p>
  78 <div class="refsect2">
  79 <a name="id-1.3.10.14.25.3.4.4"></a><h3>
  80 <a name="boost.container.pmr.resource_adaptor_impconstruct-copy-destruct"></a><code class="computeroutput">resource_adaptor_imp</code>
  81         public
  82        construct/copy/destruct</h3>
  83 <div class="orderedlist"><ol class="orderedlist" type="1">
  84 <li class="listitem">
  85 <pre class="literallayout"><a name="idm45666069872352-bb"></a><span class="identifier">resource_adaptor_imp</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
  86 <p><span class="bold"><strong>Effects</strong></span>: Default constructs m_alloc. </p>
  87 </li>
  88 <li class="listitem">
  89 <pre class="literallayout"><a name="idm45666069871072-bb"></a><span class="identifier">resource_adaptor_imp</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>
  90 <p><span class="bold"><strong>Effects</strong></span>: Copy constructs m_alloc. </p>
  91 </li>
  92 <li class="listitem">
  93 <pre class="literallayout"><a name="idm45666069868656-bb"></a><span class="identifier">resource_adaptor_imp</span><span class="special">(</span><a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>
  94 <p><span class="bold"><strong>Effects</strong></span>: Move constructs m_alloc. </p>
  95 </li>
  96 <li class="listitem">
  97 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45666069866400-bb"></a><span class="identifier">resource_adaptor_imp</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">Allocator</span> <span class="special">&amp;</span> a2<span class="special">)</span><span class="special">;</span></pre>
  98 <p><span class="bold"><strong>Effects</strong></span>: Initializes m_alloc with a2. </p>
  99 </li>
 100 <li class="listitem">
 101 <pre class="literallayout"><span class="keyword">explicit</span> <a name="idm45666069864160-bb"></a><span class="identifier">resource_adaptor_imp</span><span class="special">(</span><span class="identifier">Allocator</span> <span class="special">&amp;&amp;</span> a2<span class="special">)</span><span class="special">;</span></pre>
 102 <p><span class="bold"><strong>Effects</strong></span>: Initializes m_alloc with a2. </p>
 103 </li>
 104 <li class="listitem">
 105 <pre class="literallayout"><a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span> <a name="idm45666069861920-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>
 106 <p><span class="bold"><strong>Effects</strong></span>: Copy assigns m_alloc. </p>
 107 </li>
 108 <li class="listitem">
 109 <pre class="literallayout"><a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;</span> <a name="idm45666069858928-bb"></a><span class="keyword">operator</span><span class="special">=</span><span class="special">(</span><a class="link" href="resource_adaptor_imp.html" title="Class template resource_adaptor_imp">resource_adaptor_imp</a> <span class="special">&amp;&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>
 110 <p><span class="bold"><strong>Effects</strong></span>: Move assigns m_alloc. </p>
 111 </li>
 112 </ol></div>
 113 </div>
 114 <div class="refsect2">
 115 <a name="id-1.3.10.14.25.3.4.5"></a><h3>
 116 <a name="idm45666069876736-bb"></a><code class="computeroutput">resource_adaptor_imp</code> public member functions</h3>
 117 <div class="orderedlist"><ol class="orderedlist" type="1">
 118 <li class="listitem">
 119 <pre class="literallayout"><span class="identifier">allocator_type</span> <span class="special">&amp;</span> <a name="idm45666069876176-bb"></a><span class="identifier">get_allocator</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 120 <span class="bold"><strong>Effects</strong></span>: Returns m_alloc. </li>
 121 <li class="listitem">
 122 <pre class="literallayout"><span class="keyword">const</span> <span class="identifier">allocator_type</span> <span class="special">&amp;</span> <a name="idm45666069874480-bb"></a><span class="identifier">get_allocator</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 123 <span class="bold"><strong>Effects</strong></span>: Returns m_alloc. </li>
 124 </ol></div>
 125 </div>
 126 <div class="refsect2">
 127 <a name="id-1.3.10.14.25.3.4.6"></a><h3>
 128 <a name="idm45666069856096-bb"></a><code class="computeroutput">resource_adaptor_imp</code> protected member functions</h3>
 129 <div class="orderedlist"><ol class="orderedlist" type="1">
 130 <li class="listitem">
 131 <pre class="literallayout"><span class="keyword">virtual</span> <span class="keyword">void</span> <span class="special">*</span> <a name="idm45666069855520-bb"></a><span class="identifier">do_allocate</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> bytes<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">)</span><span class="special">;</span></pre>
 132 <p><span class="bold"><strong>Returns</strong></span>: Allocated memory obtained by calling m_alloc.allocate. The size and alignment of the allocated memory shall meet the requirements for a class derived from <code class="computeroutput"><a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a></code>. </p>
 133 </li>
 134 <li class="listitem">
 135 <pre class="literallayout"><span class="keyword">virtual</span> <span class="keyword">void</span> <a name="idm45666069851168-bb"></a><span class="identifier">do_deallocate</span><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span> p<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> bytes<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">)</span><span class="special">;</span></pre>
 136 <p><span class="bold"><strong>Requires</strong></span>: p was previously allocated using A.allocate, where A == m_alloc, and not subsequently deallocated.</p>
 137 <p><span class="bold"><strong>Effects</strong></span>: Returns memory to the allocator using m_alloc.deallocate(). </p>
 138 </li>
 139 <li class="listitem">
 140 <pre class="literallayout"><span class="keyword">virtual</span> <span class="keyword">bool</span> <a name="idm45666069846032-bb"></a><span class="identifier">do_is_equal</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="memory_resource.html" title="Class memory_resource">memory_resource</a> <span class="special">&amp;</span> other<span class="special">)</span> <span class="keyword">const</span> <span class="keyword">noexcept</span><span class="special">;</span></pre>
 141 <p>Let p be dynamic_cast&lt;const resource_adaptor_imp*&gt;(&amp;other).</p>
 142 <p><span class="bold"><strong>Returns</strong></span>: false if p is null, otherwise the value of m_alloc == p-&gt;m_alloc. </p>
 143 </li>
 144 </ol></div>
 145 </div>
 146 <div class="refsect2">
 147 <a name="id-1.3.10.14.25.3.4.7"></a><h3>
 148 <a name="idm45666069841984-bb"></a><code class="computeroutput">resource_adaptor_imp</code> private member functions</h3>
 149 <div class="orderedlist"><ol class="orderedlist" type="1">
 150 <li class="listitem"><pre class="literallayout"><span class="keyword">void</span> <span class="special">*</span> <a name="idm45666069841408-bb"></a><span class="identifier">priv_aligned_alloc</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> bytes<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">)</span><span class="special">;</span></pre></li>
 151 <li class="listitem"><pre class="literallayout"><span class="keyword">void</span> <a name="idm45666069839184-bb"></a><span class="identifier">priv_aligned_dealloc</span><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span> aligned_ptr<span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> bytes<span class="special">,</span>
 152                           <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">)</span><span class="special">;</span></pre></li>
 153 </ol></div>
 154 </div>
 155 <div class="refsect2">
 156 <a name="id-1.3.10.14.25.3.4.8"></a><h3>
 157 <a name="idm45666069836112-bb"></a><code class="computeroutput">resource_adaptor_imp</code> private static functions</h3>
 158 <div class="orderedlist"><ol class="orderedlist" type="1">
 159 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="keyword">void</span> <span class="special">*</span> <a name="idm45666069835536-bb"></a><span class="identifier">priv_bookeeping_addr_from_aligned_ptr</span><span class="special">(</span><span class="keyword">void</span> <span class="special">*</span> aligned_ptr<span class="special">)</span><span class="special">;</span></pre></li>
 160 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a name="idm45666069833712-bb"></a><span class="identifier">priv_extra_bytes_for_overalignment</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> alignment<span class="special">)</span><span class="special">;</span></pre></li>
 161 <li class="listitem"><pre class="literallayout"><span class="keyword">static</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <a name="idm45666069831888-bb"></a><span class="identifier">priv_guaranteed_allocator_alignment</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li>
 162 </ol></div>
 163 </div>
 164 </div>
 165 </div>
 166 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 167 <td align="left"></td>
 168 <td align="right"><div class="copyright-footer">Copyright &#169; 2009-2018 Ion Gaztanaga<p>
 169         Distributed under the Boost Software License, Version 1.0. (See accompanying
 170         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
 171       </p>
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