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 <span id="projectnumber">v2.00 late alpha</span>
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<div class="title">llfio_v2_xxx::mapped< T > Class Template Reference</div> </div>
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<p>Provides an owning, typed view of memory mapped from a <code>section_handle</code> or a <code>file_handle</code> suitable for feeding to STL algorithms or the Ranges TS.
<a href="classllfio__v2__xxx_1_1mapped.html#details">More...</a></p>
<p><code>#include "mapped.hpp"</code></p>
<div class="dynheader">
Inheritance diagram for llfio_v2_xxx::mapped< T >:</div>
<div class="dyncontent">
<div class="center">
<img src="classllfio__v2__xxx_1_1mapped.png" usemap="#llfio_5Fv2_5Fxxx::mapped_3C_20T_20_3E_map" alt=""/>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-types"></a>
Public Types</h2></td></tr>
<tr class="memitem:acfd0ab21349fb0eb56172b81d6a7fa83"><td class="memItemLeft" align="right" valign="top"><a id="acfd0ab21349fb0eb56172b81d6a7fa83"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#acfd0ab21349fb0eb56172b81d6a7fa83">extent_type</a> = typename section_handle::extent_type</td></tr>
<tr class="memdesc:acfd0ab21349fb0eb56172b81d6a7fa83"><td class="mdescLeft"> </td><td class="mdescRight">The extent type. <br /></td></tr>
<tr class="separator:acfd0ab21349fb0eb56172b81d6a7fa83"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a25d56aca213617d530ab3c9cb6f43df5"><td class="memItemLeft" align="right" valign="top"><a id="a25d56aca213617d530ab3c9cb6f43df5"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a> = typename section_handle::size_type</td></tr>
<tr class="memdesc:a25d56aca213617d530ab3c9cb6f43df5"><td class="mdescLeft"> </td><td class="mdescRight">The size type. <br /></td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a9a6b8b22c06bf6e9362496cdcc3ac40d"><td class="memItemLeft" align="right" valign="top"><a id="a9a6b8b22c06bf6e9362496cdcc3ac40d"></a>
constexpr </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">mapped</a> ()</td></tr>
<tr class="memdesc:a9a6b8b22c06bf6e9362496cdcc3ac40d"><td class="mdescLeft"> </td><td class="mdescRight">Default constructor. <br /></td></tr>
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<tr class="memitem:acb843c564a96365ee7eacb529b028a70"><td class="memItemLeft" align="right" valign="top"><a id="acb843c564a96365ee7eacb529b028a70"></a>
const <a class="el" href="classllfio__v2__xxx_1_1section__handle.html">section_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#acb843c564a96365ee7eacb529b028a70">section</a> () const noexcept</td></tr>
<tr class="memdesc:acb843c564a96365ee7eacb529b028a70"><td class="mdescLeft"> </td><td class="mdescRight">Returns a reference to the internal section handle. <br /></td></tr>
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<tr class="memitem:a242f94515ea03ad443afe5ecefa297a0"><td class="memItemLeft" align="right" valign="top"><a id="a242f94515ea03ad443afe5ecefa297a0"></a>
const <a class="el" href="classllfio__v2__xxx_1_1map__handle.html">map_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a242f94515ea03ad443afe5ecefa297a0">map</a> () const noexcept</td></tr>
<tr class="memdesc:a242f94515ea03ad443afe5ecefa297a0"><td class="mdescLeft"> </td><td class="mdescRight">Returns a reference to the internal map handle. <br /></td></tr>
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<tr class="memitem:afb5d860d3f7fc1d4bad147f0a121d144"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#afb5d860d3f7fc1d4bad147f0a121d144">mapped</a> (<a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a> <a class="el" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>, bool zeroed=false, section_handle::flag _flag=section_handle::flag::readwrite)</td></tr>
<tr class="separator:afb5d860d3f7fc1d4bad147f0a121d144"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6396b66fe61498bf18eaed6df6f7a2b9"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a6396b66fe61498bf18eaed6df6f7a2b9">mapped</a> (<a class="el" href="classllfio__v2__xxx_1_1section__handle.html">section_handle</a> &sh, <a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a> <a class="el" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>=(<a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a>) -1, <a class="el" href="classllfio__v2__xxx_1_1mapped.html#acfd0ab21349fb0eb56172b81d6a7fa83">extent_type</a> byteoffset=0, section_handle::flag _flag=section_handle::flag::readwrite)</td></tr>
<tr class="separator:a6396b66fe61498bf18eaed6df6f7a2b9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0c0b040a5d05978636dd20289fe5d16a"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a0c0b040a5d05978636dd20289fe5d16a">mapped</a> (<a class="el" href="classllfio__v2__xxx_1_1file__handle.html">file_handle</a> &backing, <a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a> <a class="el" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>=(<a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a>) -1, <a class="el" href="classllfio__v2__xxx_1_1mapped.html#acfd0ab21349fb0eb56172b81d6a7fa83">extent_type</a> maximum_size=0, <a class="el" href="classllfio__v2__xxx_1_1mapped.html#acfd0ab21349fb0eb56172b81d6a7fa83">extent_type</a> byteoffset=0, section_handle::flag _flag=section_handle::flag::readwrite)</td></tr>
<tr class="separator:a0c0b040a5d05978636dd20289fe5d16a"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<class T><br />
class llfio_v2_xxx::mapped< T ></h3>
<p>Provides an owning, typed view of memory mapped from a <code>section_handle</code> or a <code>file_handle</code> suitable for feeding to STL algorithms or the Ranges TS. </p>
<p>This opens a new <code>map_handle</code> (and if necessary a <code>section_handle</code>) onto the requested offset and length of the supplied source, and thus is an <em>owning</em> view of mapped memory. It can be moved, but not copied. If you wish to pass around a non-owning view, see <code>map_view<T></code>.</p>
<p>Optionally can issue a blocking write barrier on destruction of the mapped view by setting the flag <code>section_handle::flag::barrier_on_close</code>, thus forcing any changes to data referred to by this to storage before the destructor returns. </p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
<a id="afb5d860d3f7fc1d4bad147f0a121d144"></a>
<h2 class="memtitle"><span class="permalink"><a href="#afb5d860d3f7fc1d4bad147f0a121d144">◆ </a></span>mapped() <span class="overload">[1/3]</span></h2>
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<div class="memproto">
<div class="memtemplate">
template<class T > </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1mapped.html">llfio_v2_xxx::mapped</a>< T >::<a class="el" href="classllfio__v2__xxx_1_1mapped.html">mapped</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a> </td>
<td class="paramname"><em>length</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"><em>zeroed</em> = <code>false</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">section_handle::flag </td>
<td class="paramname"><em>_flag</em> = <code>section_handle::flag::readwrite</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span> </td>
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<p>Create a view of newly allocated unused memory, creating new memory if insufficient unused memory is available. Note that the memory mapped by this call may contain non-zero bits (recycled memory) unless <code>zeroed</code> is true.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">length</td><td>The number of items to map. </td></tr>
<tr><td class="paramname">zeroed</td><td>Whether to ensure that the viewed memory returned is all bits zero or not. </td></tr>
<tr><td class="paramname">_flag</td><td>The flags to pass to <code>map_handle::map()</code>. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  : _maph(<a class="code" href="classllfio__v2__xxx_1_1map__handle.html#adf0cad925c9d6accd5bd7fc3aa49884c">map_handle::map</a>(<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> * <span class="keyword">sizeof</span>(T), zeroed, _flag).value())</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  {</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  byte *addr = _maph.<a class="code" href="classllfio__v2__xxx_1_1map__handle.html#a7456b95e191ec373af61af6541dd4737">address</a>();</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">static_cast<</span>span<T> &<span class="keyword">></span>(*this) = span<T>(<span class="keyword">reinterpret_cast<</span>T *<span class="keyword">></span>(addr), <a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a>); <span class="comment">// NOLINT</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div><div class="ttc" id="namespacellfio__v2__xxx_html_aa3676f0dd69f4b54cf7e14e3f86d32b9"><div class="ttname"><a href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">llfio_v2_xxx::length</a></div><div class="ttdeci">result< section_handle::extent_type > length(const section_handle &self) noexcept</div><div class="ttdoc">Return the current maximum permitted extent of the memory section. </div><div class="ttdef"><b>Definition:</b> map_handle.hpp:675</div></div>
<div class="ttc" id="classllfio__v2__xxx_1_1map__handle_html_a7456b95e191ec373af61af6541dd4737"><div class="ttname"><a href="classllfio__v2__xxx_1_1map__handle.html#a7456b95e191ec373af61af6541dd4737">llfio_v2_xxx::map_handle::address</a></div><div class="ttdeci">byte * address() const noexcept</div><div class="ttdoc">The address in memory where this mapped view resides. </div><div class="ttdef"><b>Definition:</b> map_handle.hpp:487</div></div>
<div class="ttc" id="classllfio__v2__xxx_1_1map__handle_html_adf0cad925c9d6accd5bd7fc3aa49884c"><div class="ttname"><a href="classllfio__v2__xxx_1_1map__handle.html#adf0cad925c9d6accd5bd7fc3aa49884c">llfio_v2_xxx::map_handle::map</a></div><div class="ttdeci">static result< map_handle > map(size_type bytes, bool zeroed=false, section_handle::flag _flag=section_handle::flag::readwrite) noexcept</div></div>
</div><!-- fragment -->
</div>
</div>
<a id="a6396b66fe61498bf18eaed6df6f7a2b9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6396b66fe61498bf18eaed6df6f7a2b9">◆ </a></span>mapped() <span class="overload">[2/3]</span></h2>
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<div class="memproto">
<div class="memtemplate">
template<class T > </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1mapped.html">llfio_v2_xxx::mapped</a>< T >::<a class="el" href="classllfio__v2__xxx_1_1mapped.html">mapped</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1section__handle.html">section_handle</a> & </td>
<td class="paramname"><em>sh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a> </td>
<td class="paramname"><em>length</em> = <code>(<a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a>) -1</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#acfd0ab21349fb0eb56172b81d6a7fa83">extent_type</a> </td>
<td class="paramname"><em>byteoffset</em> = <code>0</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">section_handle::flag </td>
<td class="paramname"><em>_flag</em> = <code>section_handle::flag::readwrite</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span> </td>
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<p>Construct a mapped view of the given section handle.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">sh</td><td>The section handle to use as the data source for creating the map. </td></tr>
<tr><td class="paramname">length</td><td>The number of items to map, use -1 to mean the length of the section handle divided by <code>sizeof(T)</code>. </td></tr>
<tr><td class="paramname">byteoffset</td><td>The byte offset into the section handle, this does not need to be a multiple of the page size. </td></tr>
<tr><td class="paramname">_flag</td><td>The flags to pass to <code>map_handle::map()</code>. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  : <a class="code" href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">mapped</a>((<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> == 0) ? <a class="code" href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">mapped</a>() : <a class="code" href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">mapped</a>(<span class="keyword">nullptr</span>, 0,</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> #ifdef _WIN32</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  byteoffset & ~65535,</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> #<span class="keywordflow">else</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <a class="code" href="namespacellfio__v2__xxx_1_1utils.html#a5499feaf6b774e774a26e7decd11e3fa">utils::round_down_to_page_size</a>(byteoffset, <a class="code" href="namespacellfio__v2__xxx_1_1utils.html#a42fc69cae3dbbf66498545cbe358e2ba">utils::page_size</a>()),</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> #endif</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  byteoffset, &sh, (<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> == (<a class="code" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a>) -1) ? 0 : <a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> * <span class="keyword">sizeof</span>(T), _flag)) <span class="comment">// NOLINT</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  {</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div><div class="ttc" id="classllfio__v2__xxx_1_1mapped_html_a25d56aca213617d530ab3c9cb6f43df5"><div class="ttname"><a href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">llfio_v2_xxx::mapped::size_type</a></div><div class="ttdeci">typename section_handle::size_type size_type</div><div class="ttdoc">The size type. </div><div class="ttdef"><b>Definition:</b> mapped.hpp:52</div></div>
<div class="ttc" id="namespacellfio__v2__xxx_html_aa3676f0dd69f4b54cf7e14e3f86d32b9"><div class="ttname"><a href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">llfio_v2_xxx::length</a></div><div class="ttdeci">result< section_handle::extent_type > length(const section_handle &self) noexcept</div><div class="ttdoc">Return the current maximum permitted extent of the memory section. </div><div class="ttdef"><b>Definition:</b> map_handle.hpp:675</div></div>
<div class="ttc" id="namespacellfio__v2__xxx_1_1utils_html_a5499feaf6b774e774a26e7decd11e3fa"><div class="ttname"><a href="namespacellfio__v2__xxx_1_1utils.html#a5499feaf6b774e774a26e7decd11e3fa">llfio_v2_xxx::utils::round_down_to_page_size</a></div><div class="ttdeci">T round_down_to_page_size(T i, size_t pagesize) noexcept</div><div class="ttdoc">Round a value to its next lowest page size multiple. </div><div class="ttdef"><b>Definition:</b> utils.hpp:51</div></div>
<div class="ttc" id="namespacellfio__v2__xxx_1_1utils_html_a42fc69cae3dbbf66498545cbe358e2ba"><div class="ttname"><a href="namespacellfio__v2__xxx_1_1utils.html#a42fc69cae3dbbf66498545cbe358e2ba">llfio_v2_xxx::utils::page_size</a></div><div class="ttdeci">size_t page_size() noexcept</div><div class="ttdoc">Returns the smallest page size of this architecture which is useful for calculating direct i/o multip...</div></div>
<div class="ttc" id="classllfio__v2__xxx_1_1mapped_html_a9a6b8b22c06bf6e9362496cdcc3ac40d"><div class="ttname"><a href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">llfio_v2_xxx::mapped::mapped</a></div><div class="ttdeci">constexpr mapped()</div><div class="ttdoc">Default constructor. </div><div class="ttdef"><b>Definition:</b> mapped.hpp:77</div></div>
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<a id="a0c0b040a5d05978636dd20289fe5d16a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0c0b040a5d05978636dd20289fe5d16a">◆ </a></span>mapped() <span class="overload">[3/3]</span></h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template<class T > </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1mapped.html">llfio_v2_xxx::mapped</a>< T >::<a class="el" href="classllfio__v2__xxx_1_1mapped.html">mapped</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1file__handle.html">file_handle</a> & </td>
<td class="paramname"><em>backing</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a> </td>
<td class="paramname"><em>length</em> = <code>(<a class="el" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a>) -1</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#acfd0ab21349fb0eb56172b81d6a7fa83">extent_type</a> </td>
<td class="paramname"><em>maximum_size</em> = <code>0</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classllfio__v2__xxx_1_1mapped.html#acfd0ab21349fb0eb56172b81d6a7fa83">extent_type</a> </td>
<td class="paramname"><em>byteoffset</em> = <code>0</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">section_handle::flag </td>
<td class="paramname"><em>_flag</em> = <code>section_handle::flag::readwrite</code> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span> </td>
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<p>Construct a mapped view of the given file.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">backing</td><td>The handle to use as backing storage. </td></tr>
<tr><td class="paramname">length</td><td>The number of items to map, use -1 to mean the length of the section handle divided by <code>sizeof(T)</code>. </td></tr>
<tr><td class="paramname">maximum_size</td><td>The initial size of this section <em>in bytes</em>, which cannot be larger than any backing file. Zero means to use <code>backing.maximum_extent()</code>. </td></tr>
<tr><td class="paramname">byteoffset</td><td>The byte offset into the section handle, this does not need to be a multiple of the page size. </td></tr>
<tr><td class="paramname">_flag</td><td>The flags to pass to <code>map_handle::map()</code>. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  : <a class="code" href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">mapped</a>((<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> == 0) ? <a class="code" href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">mapped</a>() : <a class="code" href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">mapped</a>(&backing, maximum_size,</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> #ifdef _WIN32</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  byteoffset & ~65535,</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> #<span class="keywordflow">else</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <a class="code" href="namespacellfio__v2__xxx_1_1utils.html#a5499feaf6b774e774a26e7decd11e3fa">utils::round_down_to_page_size</a>(byteoffset, <a class="code" href="namespacellfio__v2__xxx_1_1utils.html#a42fc69cae3dbbf66498545cbe358e2ba">utils::page_size</a>()),</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> #endif</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  byteoffset, <span class="keyword">nullptr</span>, (<a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> == (<a class="code" href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">size_type</a>) -1) ? 0 : <a class="code" href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">length</a> * <span class="keyword">sizeof</span>(T), _flag)) <span class="comment">// NOLINT</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  {</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  }</div><div class="ttc" id="classllfio__v2__xxx_1_1mapped_html_a25d56aca213617d530ab3c9cb6f43df5"><div class="ttname"><a href="classllfio__v2__xxx_1_1mapped.html#a25d56aca213617d530ab3c9cb6f43df5">llfio_v2_xxx::mapped::size_type</a></div><div class="ttdeci">typename section_handle::size_type size_type</div><div class="ttdoc">The size type. </div><div class="ttdef"><b>Definition:</b> mapped.hpp:52</div></div>
<div class="ttc" id="namespacellfio__v2__xxx_html_aa3676f0dd69f4b54cf7e14e3f86d32b9"><div class="ttname"><a href="namespacellfio__v2__xxx.html#aa3676f0dd69f4b54cf7e14e3f86d32b9">llfio_v2_xxx::length</a></div><div class="ttdeci">result< section_handle::extent_type > length(const section_handle &self) noexcept</div><div class="ttdoc">Return the current maximum permitted extent of the memory section. </div><div class="ttdef"><b>Definition:</b> map_handle.hpp:675</div></div>
<div class="ttc" id="namespacellfio__v2__xxx_1_1utils_html_a5499feaf6b774e774a26e7decd11e3fa"><div class="ttname"><a href="namespacellfio__v2__xxx_1_1utils.html#a5499feaf6b774e774a26e7decd11e3fa">llfio_v2_xxx::utils::round_down_to_page_size</a></div><div class="ttdeci">T round_down_to_page_size(T i, size_t pagesize) noexcept</div><div class="ttdoc">Round a value to its next lowest page size multiple. </div><div class="ttdef"><b>Definition:</b> utils.hpp:51</div></div>
<div class="ttc" id="namespacellfio__v2__xxx_1_1utils_html_a42fc69cae3dbbf66498545cbe358e2ba"><div class="ttname"><a href="namespacellfio__v2__xxx_1_1utils.html#a42fc69cae3dbbf66498545cbe358e2ba">llfio_v2_xxx::utils::page_size</a></div><div class="ttdeci">size_t page_size() noexcept</div><div class="ttdoc">Returns the smallest page size of this architecture which is useful for calculating direct i/o multip...</div></div>
<div class="ttc" id="classllfio__v2__xxx_1_1mapped_html_a9a6b8b22c06bf6e9362496cdcc3ac40d"><div class="ttname"><a href="classllfio__v2__xxx_1_1mapped.html#a9a6b8b22c06bf6e9362496cdcc3ac40d">llfio_v2_xxx::mapped::mapped</a></div><div class="ttdeci">constexpr mapped()</div><div class="ttdoc">Default constructor. </div><div class="ttdef"><b>Definition:</b> mapped.hpp:77</div></div>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>include/llfio/v2.0/<a class="el" href="mapped_8hpp.html">mapped.hpp</a></li>
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