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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A stateless <a href="md_doc_concepts.html#concept_rawallocator">RawAllocator</a> that allocates memory using the virtual memory allocation functions. </p>
<p>It does not prereserve any memory and will always reserve and commit combined. </p>
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Typedefs</h2></td></tr>
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using&#160;</td><td class="memItemRight" valign="bottom"><b>is_stateful</b> = std::false_type</td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>virtual_memory_allocator</b> (<a class="el" href="classfoonathan_1_1memory_1_1virtual__memory__allocator.html">virtual_memory_allocator</a> &amp;&amp;) noexcept</td></tr>
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<a class="el" href="classfoonathan_1_1memory_1_1virtual__memory__allocator.html">virtual_memory_allocator</a> &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>operator=</b> (<a class="el" href="classfoonathan_1_1memory_1_1virtual__memory__allocator.html">virtual_memory_allocator</a> &amp;&amp;) noexcept</td></tr>
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<tr class="memitem:aa0774f4f3278b78aab48272657c8da07"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classfoonathan_1_1memory_1_1virtual__memory__allocator.html#aa0774f4f3278b78aab48272657c8da07">allocate_node</a> (std::size_t size, std::size_t alignment)</td></tr>
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<tr class="memitem:a3ad08c20db9eb913afdf5fc8de437d58"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classfoonathan_1_1memory_1_1virtual__memory__allocator.html#a3ad08c20db9eb913afdf5fc8de437d58">deallocate_node</a> (void *node, std::size_t size, std::size_t alignment) noexcept</td></tr>
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<tr class="memitem:acaa832c9a7c293c443582bce418e6ff7"><td class="memItemLeft" align="right" valign="top">std::size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classfoonathan_1_1memory_1_1virtual__memory__allocator.html#acaa832c9a7c293c443582bce418e6ff7">max_node_size</a> () const noexcept</td></tr>
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<tr class="memitem:ad27c2a48d0e62db7ea79ae69f2fa7708"><td class="memItemLeft" align="right" valign="top">std::size_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classfoonathan_1_1memory_1_1virtual__memory__allocator.html#ad27c2a48d0e62db7ea79ae69f2fa7708">max_alignment</a> () const noexcept</td></tr>
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<h2 class="groupheader">Member Functions</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#aa0774f4f3278b78aab48272657c8da07">&#9670;&nbsp;</a></span>allocate_node()</h2>

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          <td class="memname">void* allocate_node </td>
          <td>(</td>
          <td class="paramtype">std::size_t&#160;</td>
          <td class="paramname"><em>size</em>, </td>
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          <td class="paramtype">std::size_t&#160;</td>
          <td class="paramname"><em>alignment</em>&#160;</td>
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          <td>)</td>
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<dl class="section user"><dt>Effects:</dt><dd>A <a href="md_doc_concepts.html#concept_rawallocator">RawAllocator</a> allocation function. It uses <a class="el" href="group__allocator.html#gaf5c93e4011951142ba923ce105fd2326">virtual_memory_reserve</a> followed by <a class="el" href="group__allocator.html#ga611ec17550bb9442b14ba7a25d2dcf92">virtual_memory_commit</a> for the allocation. The number of pages allocated will be the minimum to hold <code>size</code> continuous bytes, i.e. <code>size</code> will be rounded up to the next multiple. If debug fences are activated, one additional page before and after the memory will be allocated. </dd></dl>
<dl class="section user"><dt>Returns:</dt><dd>A pointer to a <a href="md_doc_concepts.html#concept_node">node</a>, it will never be <code>nullptr</code>. It will always be aligned on a fence boundary, regardless of the alignment parameter. </dd></dl>
<dl class="section user"><dt>Throws:</dt><dd>An exception of type <a class="el" href="classfoonathan_1_1memory_1_1out__of__memory.html">out_of_memory</a> or whatever is thrown by its handler if the allocation fails. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a3ad08c20db9eb913afdf5fc8de437d58">&#9670;&nbsp;</a></span>deallocate_node()</h2>

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          <td class="memname">void deallocate_node </td>
          <td>(</td>
          <td class="paramtype">void *&#160;</td>
          <td class="paramname"><em>node</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">std::size_t&#160;</td>
          <td class="paramname"><em>size</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">std::size_t&#160;</td>
          <td class="paramname"><em>alignment</em>&#160;</td>
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          <td>)</td>
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<span class="mlabels"><span class="mlabel">noexcept</span></span>  </td>
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<dl class="section user"><dt>Effects:</dt><dd>A <a href="md_doc_concepts.html#concept_rawallocator">RawAllocator</a> deallocation function. It calls <a class="el" href="group__allocator.html#ga10952511b7b0b9e0b536b92044727d45">virtual_memory_decommit</a> followed by <a class="el" href="group__allocator.html#ga7ea785698aa5c576b390e5c61c265c77">virtual_memory_release</a> for the deallocation. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#acaa832c9a7c293c443582bce418e6ff7">&#9670;&nbsp;</a></span>max_node_size()</h2>

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          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<dl class="section user"><dt>Returns:</dt><dd>The maximum node size by returning the maximum value. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ad27c2a48d0e62db7ea79ae69f2fa7708">&#9670;&nbsp;</a></span>max_alignment()</h2>

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          <td>(</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<dl class="section user"><dt>Returns:</dt><dd>The maximum alignment which is the same as the <a class="el" href="group__allocator.html#gafee5129a1877dc067703d7b24d00035c">virtual_memory_page_size</a>. </dd></dl>

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