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  26 <div class="refentry">
  27 <a name="boost.interprocess.allocator"></a><div class="titlepage"></div>
  28 <div class="refnamediv">
  29 <h2><span class="refentrytitle">Class template allocator</span></h2>
  30 <p>boost::interprocess::allocator</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="../../interprocess/indexes_reference.html#header.boost.interprocess.allocators.allocator_hpp" title="Header &lt;boost/interprocess/allocators/allocator.hpp&gt;">boost/interprocess/allocators/allocator.hpp</a>&gt;
  34
  35 </span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">typename</span> SegmentManager<span class="special">&gt;</span>
  36 <span class="keyword">class</span> <a class="link" href="allocator.html" title="Class template allocator">allocator</a> <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">SegmentManager</span>                                                                        <a name="boost.interprocess.allocator.segment_manager"></a><span class="identifier">segment_manager</span><span class="special">;</span>
  40   <span class="keyword">typedef</span> <span class="identifier">SegmentManager</span><span class="special">::</span><span class="identifier">void_pointer</span>                                                          <a name="boost.interprocess.allocator.void_pointer"></a><span class="identifier">void_pointer</span><span class="special">;</span>
  41   <span class="keyword">typedef</span> <span class="identifier">T</span>                                                                                     <a name="boost.interprocess.allocator.value_type"></a><span class="identifier">value_type</span><span class="special">;</span>
  42   <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">pointer_traits</span><span class="special">&lt;</span> <span class="identifier">cvoid_ptr</span> <span class="special">&gt;</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">rebind_pointer</span><span class="special">&lt;</span> <span class="identifier">T</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>     <a name="boost.interprocess.allocator.pointer"></a><span class="identifier">pointer</span><span class="special">;</span>
  43   <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">intrusive</span><span class="special">::</span><span class="identifier">pointer_traits</span><span class="special">&lt;</span> <span class="identifier">pointer</span> <span class="special">&gt;</span><span class="special">::</span><span class="keyword">template</span> <span class="identifier">rebind_pointer</span><span class="special">&lt;</span> <span class="keyword">const</span> <span class="identifier">T</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <a name="boost.interprocess.allocator.const_pointer"></a><span class="identifier">const_pointer</span><span class="special">;</span>
  44   <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span>                                                                           <a name="boost.interprocess.allocator.reference"></a><span class="identifier">reference</span><span class="special">;</span>
  45   <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span>                                                                           <a name="boost.interprocess.allocator.const_reference"></a><span class="identifier">const_reference</span><span class="special">;</span>
  46   <span class="keyword">typedef</span> <span class="identifier">segment_manager</span><span class="special">::</span><span class="identifier">size_type</span>                                                            <a name="boost.interprocess.allocator.size_type"></a><span class="identifier">size_type</span><span class="special">;</span>
  47   <span class="keyword">typedef</span> <span class="identifier">segment_manager</span><span class="special">::</span><span class="identifier">difference_type</span>                                                      <a name="boost.interprocess.allocator.difference_type"></a><span class="identifier">difference_type</span><span class="special">;</span>
  48   <span class="keyword">typedef</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">interprocess</span><span class="special">::</span><span class="identifier">version_type</span><span class="special">&lt;</span> <a class="link" href="allocator.html" title="Class template allocator">allocator</a><span class="special">,</span> <span class="number">2</span> <span class="special">&gt;</span>                                     <a name="boost.interprocess.allocator.version"></a><span class="identifier">version</span><span class="special">;</span>
  49
  50   <span class="comment">// member classes/structs/unions</span>
  51   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T2<span class="special">&gt;</span>
  52   <span class="keyword">struct</span> <a class="link" href="allocator/rebind.html" title="Struct template rebind">rebind</a> <span class="special">{</span>
  53     <span class="comment">// types</span>
  54     <span class="keyword">typedef</span> <a class="link" href="allocator.html" title="Class template allocator">allocator</a><span class="special">&lt;</span> <span class="identifier">T2</span><span class="special">,</span> <span class="identifier">SegmentManager</span> <span class="special">&gt;</span> <a class="link" href="allocator/rebind.html#boost.interprocess.allocator.rebind.other"><span class="identifier">other</span></a><span class="special">;</span>
  55   <span class="special">}</span><span class="special">;</span>
  56
  57   <span class="comment">// <a class="link" href="allocator.html#boost.interprocess.allocatorconstruct-copy-destruct">construct/copy/destruct</a></span>
  58   <a class="link" href="allocator.html#idp42903712-bb"><span class="identifier">allocator</span></a><span class="special">(</span><span class="identifier">segment_manager</span> <span class="special">*</span><span class="special">)</span><span class="special">;</span>
  59   <a class="link" href="allocator.html#idp42905136-bb"><span class="identifier">allocator</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="allocator.html" title="Class template allocator">allocator</a> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  60   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T2<span class="special">&gt;</span> <a class="link" href="allocator.html#idp42907008-bb"><span class="identifier">allocator</span></a><span class="special">(</span><span class="keyword">const</span> <a class="link" href="allocator.html" title="Class template allocator">allocator</a><span class="special">&lt;</span> <span class="identifier">T2</span><span class="special">,</span> <span class="identifier">SegmentManager</span> <span class="special">&gt;</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  61
  62   <span class="comment">// <a class="link" href="allocator.html#idp42858480-bb">public member functions</a></span>
  63   <span class="identifier">segment_manager</span> <span class="special">*</span> <a class="link" href="allocator.html#idp42859040-bb"><span class="identifier">get_segment_manager</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  64   <span class="identifier">pointer</span> <a class="link" href="allocator.html#idp42860608-bb"><span class="identifier">allocate</span></a><span class="special">(</span><span class="identifier">size_type</span><span class="special">,</span> <span class="identifier">cvoid_ptr</span> <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span>
  65   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42864352-bb"><span class="identifier">deallocate</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">size_type</span><span class="special">)</span><span class="special">;</span>
  66   <span class="identifier">size_type</span> <a class="link" href="allocator.html#idp42867024-bb"><span class="identifier">max_size</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  67   <span class="identifier">size_type</span> <a class="link" href="allocator.html#idp42868608-bb"><span class="identifier">size</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  68   <span class="identifier">pointer</span> <a class="link" href="allocator.html#idp42871008-bb"><span class="identifier">allocation_command</span></a><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">interprocess</span><span class="special">::</span><span class="identifier">allocation_type</span><span class="special">,</span> <span class="identifier">size_type</span><span class="special">,</span>
  69                              <span class="identifier">size_type</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">pointer</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  70   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42874640-bb"><span class="identifier">allocate_many</span></a><span class="special">(</span><span class="identifier">size_type</span><span class="special">,</span> <span class="identifier">size_type</span><span class="special">,</span> <span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  71   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42878272-bb"><span class="identifier">allocate_many</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">size_type</span> <span class="special">*</span><span class="special">,</span> <span class="identifier">size_type</span><span class="special">,</span> <span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  72   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42881712-bb"><span class="identifier">deallocate_many</span></a><span class="special">(</span><span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  73   <span class="identifier">pointer</span> <a class="link" href="allocator.html#idp42883968-bb"><span class="identifier">allocate_one</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span>
  74   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42886096-bb"><span class="identifier">allocate_individual</span></a><span class="special">(</span><span class="identifier">size_type</span><span class="special">,</span> <span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  75   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42889056-bb"><span class="identifier">deallocate_one</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  76   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42891184-bb"><span class="identifier">deallocate_individual</span></a><span class="special">(</span><span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  77   <span class="identifier">pointer</span> <a class="link" href="allocator.html#idp42893456-bb"><span class="identifier">address</span></a><span class="special">(</span><span class="identifier">reference</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  78   <span class="identifier">const_pointer</span> <a class="link" href="allocator.html#idp42895712-bb"><span class="identifier">address</span></a><span class="special">(</span><span class="identifier">const_reference</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  79   <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> P<span class="special">&gt;</span> <span class="keyword">void</span> <a class="link" href="allocator.html#idp42897968-bb"><span class="identifier">construct</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">P</span> <span class="special">&amp;&amp;</span><span class="special">)</span><span class="special">;</span>
  80   <span class="keyword">void</span> <a class="link" href="allocator.html#idp42901568-bb"><span class="identifier">destroy</span></a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  81
  82   <span class="comment">// <a class="link" href="allocator.html#idp42909744-bb">friend functions</a></span>
  83   <span class="keyword">friend</span> <span class="keyword">void</span> <a class="link" href="allocator.html#idp42910304-bb"><span class="identifier">swap</span></a><span class="special">(</span><span class="identifier">self_t</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">self_t</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
  84 <span class="special">}</span><span class="special">;</span></pre></div>
  85 <div class="refsect1">
  86 <a name="idp275226160"></a><h2>Description</h2>
  87 <p>An STL compatible allocator that uses a segment manager as memory source. The internal pointer type will of the same type (raw, smart) as "typename SegmentManager::void_pointer" type. This allows placing the allocator in shared memory, memory mapped-files, etc... </p>
  88 <div class="refsect2">
  89 <a name="idp275227120"></a><h3>
  90 <a name="boost.interprocess.allocatorconstruct-copy-destruct"></a><code class="computeroutput">allocator</code>
  91         public
  92        construct/copy/destruct</h3>
  93 <div class="orderedlist"><ol class="orderedlist" type="1">
  94 <li class="listitem">
  95 <pre class="literallayout"><a name="idp42903712-bb"></a><span class="identifier">allocator</span><span class="special">(</span><span class="identifier">segment_manager</span> <span class="special">*</span> segment_mngr<span class="special">)</span><span class="special">;</span></pre>
  96 <p>Constructor from the segment manager. Never throws </p>
  97 </li>
  98 <li class="listitem">
  99 <pre class="literallayout"><a name="idp42905136-bb"></a><span class="identifier">allocator</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="allocator.html" title="Class template allocator">allocator</a> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>
 100 <p>Constructor from other allocator. Never throws </p>
 101 </li>
 102 <li class="listitem">
 103 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T2<span class="special">&gt;</span> <a name="idp42907008-bb"></a><span class="identifier">allocator</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="allocator.html" title="Class template allocator">allocator</a><span class="special">&lt;</span> <span class="identifier">T2</span><span class="special">,</span> <span class="identifier">SegmentManager</span> <span class="special">&gt;</span> <span class="special">&amp;</span> other<span class="special">)</span><span class="special">;</span></pre>
 104 <p>Constructor from related allocator. Never throws </p>
 105 </li>
 106 </ol></div>
 107 </div>
 108 <div class="refsect2">
 109 <a name="idp275252608"></a><h3>
 110 <a name="idp42858480-bb"></a><code class="computeroutput">allocator</code> public member functions</h3>
 111 <div class="orderedlist"><ol class="orderedlist" type="1">
 112 <li class="listitem">
 113 <pre class="literallayout"><span class="identifier">segment_manager</span> <span class="special">*</span> <a name="idp42859040-bb"></a><span class="identifier">get_segment_manager</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 114 <p>Returns the segment manager. Never throws </p>
 115 </li>
 116 <li class="listitem">
 117 <pre class="literallayout"><span class="identifier">pointer</span> <a name="idp42860608-bb"></a><span class="identifier">allocate</span><span class="special">(</span><span class="identifier">size_type</span> count<span class="special">,</span> <span class="identifier">cvoid_ptr</span> hint <span class="special">=</span> <span class="number">0</span><span class="special">)</span><span class="special">;</span></pre>
 118 <p>Allocates memory for an array of count elements. Throws <code class="computeroutput"><a class="link" href="bad_alloc.html" title="Class bad_alloc">boost::interprocess::bad_alloc</a></code> if there is no enough memory </p>
 119 </li>
 120 <li class="listitem">
 121 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42864352-bb"></a><span class="identifier">deallocate</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span> ptr<span class="special">,</span> <span class="identifier">size_type</span><span class="special">)</span><span class="special">;</span></pre>
 122 <p>Deallocates memory previously allocated. Never throws </p>
 123 </li>
 124 <li class="listitem">
 125 <pre class="literallayout"><span class="identifier">size_type</span> <a name="idp42867024-bb"></a><span class="identifier">max_size</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 126 <p>Returns the number of elements that could be allocated. Never throws </p>
 127 </li>
 128 <li class="listitem">
 129 <pre class="literallayout"><span class="identifier">size_type</span> <a name="idp42868608-bb"></a><span class="identifier">size</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span> p<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 130 <p>Returns maximum the number of objects the previously allocated memory pointed by p can hold. This size only works for memory allocated with allocate, allocation_command and allocate_many. </p>
 131 </li>
 132 <li class="listitem"><pre class="literallayout"><span class="identifier">pointer</span> <a name="idp42871008-bb"></a><span class="identifier">allocation_command</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">interprocess</span><span class="special">::</span><span class="identifier">allocation_type</span> command<span class="special">,</span>
 133                            <span class="identifier">size_type</span> limit_size<span class="special">,</span>
 134                            <span class="identifier">size_type</span> <span class="special">&amp;</span> prefer_in_recvd_out_size<span class="special">,</span>
 135                            <span class="identifier">pointer</span> <span class="special">&amp;</span> reuse<span class="special">)</span><span class="special">;</span></pre></li>
 136 <li class="listitem">
 137 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42874640-bb"></a><span class="identifier">allocate_many</span><span class="special">(</span><span class="identifier">size_type</span> elem_size<span class="special">,</span> <span class="identifier">size_type</span> num_elements<span class="special">,</span>
 138                    <span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span> chain<span class="special">)</span><span class="special">;</span></pre>
 139 <p>Allocates many elements of size elem_size in a contiguous block of memory. The minimum number to be allocated is min_elements, the preferred and maximum number is preferred_elements. The number of actually allocated elements is will be assigned to received_size. The elements must be deallocated with deallocate(...) </p>
 140 </li>
 141 <li class="listitem">
 142 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42878272-bb"></a><span class="identifier">allocate_many</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">size_type</span> <span class="special">*</span> elem_sizes<span class="special">,</span> <span class="identifier">size_type</span> n_elements<span class="special">,</span>
 143                    <span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span> chain<span class="special">)</span><span class="special">;</span></pre>
 144 <p>Allocates n_elements elements, each one of size elem_sizes[i]in a contiguous block of memory. The elements must be deallocated </p>
 145 </li>
 146 <li class="listitem">
 147 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42881712-bb"></a><span class="identifier">deallocate_many</span><span class="special">(</span><span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span> chain<span class="special">)</span><span class="special">;</span></pre>
 148 <p>Allocates many elements of size elem_size in a contiguous block of memory. The minimum number to be allocated is min_elements, the preferred and maximum number is preferred_elements. The number of actually allocated elements is will be assigned to received_size. The elements must be deallocated with deallocate(...) </p>
 149 </li>
 150 <li class="listitem">
 151 <pre class="literallayout"><span class="identifier">pointer</span> <a name="idp42883968-bb"></a><span class="identifier">allocate_one</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre>
 152 <p>Allocates just one object. Memory allocated with this function must be deallocated only with deallocate_one(). Throws <code class="computeroutput"><a class="link" href="bad_alloc.html" title="Class bad_alloc">boost::interprocess::bad_alloc</a></code> if there is no enough memory </p>
 153 </li>
 154 <li class="listitem">
 155 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42886096-bb"></a><span class="identifier">allocate_individual</span><span class="special">(</span><span class="identifier">size_type</span> num_elements<span class="special">,</span>
 156                          <span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span> chain<span class="special">)</span><span class="special">;</span></pre>
 157 <p>Allocates many elements of size == 1 in a contiguous block of memory. The minimum number to be allocated is min_elements, the preferred and maximum number is preferred_elements. The number of actually allocated elements is will be assigned to received_size. Memory allocated with this function must be deallocated only with deallocate_one(). </p>
 158 </li>
 159 <li class="listitem">
 160 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42889056-bb"></a><span class="identifier">deallocate_one</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span> p<span class="special">)</span><span class="special">;</span></pre>
 161 <p>Deallocates memory previously allocated with allocate_one(). You should never use deallocate_one to deallocate memory allocated with other functions different from allocate_one(). Never throws </p>
 162 </li>
 163 <li class="listitem">
 164 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42891184-bb"></a><span class="identifier">deallocate_individual</span><span class="special">(</span><span class="identifier">multiallocation_chain</span> <span class="special">&amp;</span> chain<span class="special">)</span><span class="special">;</span></pre>
 165 <p>Allocates many elements of size == 1 in a contiguous block of memory. The minimum number to be allocated is min_elements, the preferred and maximum number is preferred_elements. The number of actually allocated elements is will be assigned to received_size. Memory allocated with this function must be deallocated only with deallocate_one(). </p>
 166 </li>
 167 <li class="listitem">
 168 <pre class="literallayout"><span class="identifier">pointer</span> <a name="idp42893456-bb"></a><span class="identifier">address</span><span class="special">(</span><span class="identifier">reference</span> value<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 169 <p>Returns address of mutable object. Never throws </p>
 170 </li>
 171 <li class="listitem">
 172 <pre class="literallayout"><span class="identifier">const_pointer</span> <a name="idp42895712-bb"></a><span class="identifier">address</span><span class="special">(</span><span class="identifier">const_reference</span> value<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
 173 <p>Returns address of non mutable object. Never throws </p>
 174 </li>
 175 <li class="listitem">
 176 <pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> P<span class="special">&gt;</span> <span class="keyword">void</span> <a name="idp42897968-bb"></a><span class="identifier">construct</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span> ptr<span class="special">,</span> <span class="identifier">P</span> <span class="special">&amp;&amp;</span> p<span class="special">)</span><span class="special">;</span></pre>
 177 <p>Constructs an object Throws if T's constructor throws For backwards compatibility with libraries using C++03 allocators </p>
 178 </li>
 179 <li class="listitem">
 180 <pre class="literallayout"><span class="keyword">void</span> <a name="idp42901568-bb"></a><span class="identifier">destroy</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pointer</span> <span class="special">&amp;</span> ptr<span class="special">)</span><span class="special">;</span></pre>
 181 <p>Destroys object. Throws if object's destructor throws </p>
 182 </li>
 183 </ol></div>
 184 </div>
 185 <div class="refsect2">
 186 <a name="idp275385328"></a><h3>
 187 <a name="idp42909744-bb"></a><code class="computeroutput">allocator</code> friend functions</h3>
 188 <div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem">
 189 <pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">void</span> <a name="idp42910304-bb"></a><span class="identifier">swap</span><span class="special">(</span><span class="identifier">self_t</span> <span class="special">&amp;</span> alloc1<span class="special">,</span> <span class="identifier">self_t</span> <span class="special">&amp;</span> alloc2<span class="special">)</span><span class="special">;</span></pre>
 190 <p>Swap segment manager. Does not throw. If each allocator is placed in different memory segments, the result is undefined. </p>
 191 </li></ol></div>
 192 </div>
 193 </div>
 194 </div>
 195 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
 196 <td align="left"></td>
 197 <td align="right"><div class="copyright-footer">Copyright &#169; 2005-2015 Ion Gaztanaga<p>
 198         Distributed under the Boost Software License, Version 1.0. (See accompanying
 199         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>)
 200       </p>
 201 </div></td>
 202 </tr></table>
 203 <hr>
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