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<div class="title">llfio_v2_xxx::process_handle Class Reference</div> </div>
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<p>A handle to this, or another, process.
<a href="classllfio__v2__xxx_1_1process__handle.html#details">More...</a></p>
<p><code>#include "process_handle.hpp"</code></p>
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Inheritance diagram for llfio_v2_xxx::process_handle:</div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Classes</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structllfio__v2__xxx_1_1process__handle_1_1__byte__array__deleter.html">_byte_array_deleter</a></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><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:aa7e16281bce4c3bb7cf1bf337dd5b7ac"><td class="memItemLeft" align="right" valign="top"><a id="aa7e16281bce4c3bb7cf1bf337dd5b7ac"></a>
using </td><td class="memItemRight" valign="bottom"><b>path_type</b> = <a class="el" href="classllfio__v2__xxx_1_1handle.html#a33481bae57d9ccd0c97946416f9682f3">handle::path_type</a></td></tr>
<tr class="separator:aa7e16281bce4c3bb7cf1bf337dd5b7ac"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a32d7120046bf8d178ca7faba27b69b46"><td class="memItemLeft" align="right" valign="top"><a id="a32d7120046bf8d178ca7faba27b69b46"></a>
using </td><td class="memItemRight" valign="bottom"><b>extent_type</b> = <a class="el" href="classllfio__v2__xxx_1_1handle.html#a4ee58f1b6a24af5e64d850d1e3eed07f">handle::extent_type</a></td></tr>
<tr class="separator:a32d7120046bf8d178ca7faba27b69b46"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a374e0db9af84a5dc1243123a9cb1b01c"><td class="memItemLeft" align="right" valign="top"><a id="a374e0db9af84a5dc1243123a9cb1b01c"></a>
using </td><td class="memItemRight" valign="bottom"><b>size_type</b> = <a class="el" href="classllfio__v2__xxx_1_1handle.html#aed9587571c3fb932adadddc1beeeed58">handle::size_type</a></td></tr>
<tr class="separator:a374e0db9af84a5dc1243123a9cb1b01c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa3930273a2d4cabbac309e0b75701dca"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">mode</a> : unsigned char { <br />
  <b>unchanged</b> = 0,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dcaa334c4a4c42fdb79d7ebc3e73b517e6f8">mode::none</a> = 2,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dcaaa4daf6d1e8da35af49c33bbe9ee91d79">mode::attr_read</a> = 4,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dcaa9f56aff64cb748e078ab221474132d19">mode::attr_write</a> = 5,
<br />
  <a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dcaaecae13117d6f0584c25a9da6c8f8415e">mode::read</a> = 6,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dcaaefb2a684e4afb7d55e6147fbe5a332ee">mode::write</a> = 7,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dcaa9516dfb15f51c7ee19a4d46b8c0dbe1d">mode::append</a> = 9
<br />
}</td></tr>
<tr class="memdesc:aa3930273a2d4cabbac309e0b75701dca"><td class="mdescLeft"> </td><td class="mdescRight">The behaviour of the handle: does it read, read and write, or atomic append? <a href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">More...</a><br /></td></tr>
<tr class="separator:aa3930273a2d4cabbac309e0b75701dca"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af0b352d0f273ba6fa70c178b2c2fee42"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">creation</a> : unsigned char { <br />
  <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42aa200dcd6176417e93be2405188ae7cc9">creation::open_existing</a> = 0,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42abba3bc579480e6c94ecd81b7b5923255">creation::only_if_not_exist</a>,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42a8f0339e854eb5321306a443ce9199e1d">creation::if_needed</a>,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42abb872caae430ba70f670508aca38feed">creation::truncate_existing</a>,
<br />
  <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42af7cf95e0f43dc8f79e39ae628c85a11d">creation::always_new</a>
<br />
}</td></tr>
<tr class="memdesc:af0b352d0f273ba6fa70c178b2c2fee42"><td class="mdescLeft"> </td><td class="mdescRight">On opening, do we also create a new file or truncate an existing one? <a href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">More...</a><br /></td></tr>
<tr class="separator:af0b352d0f273ba6fa70c178b2c2fee42"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aecd3a7db6cee3aec07d32fe6f99e6852"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">caching</a> : unsigned char { <br />
  <b>unchanged</b> = 0,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852a334c4a4c42fdb79d7ebc3e73b517e6f8">caching::none</a> = 1,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852ab8a61dd00ce6fc5888706bda8fab2e98">caching::only_metadata</a> = 2,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852a0fb9cf5f04f61bb6f1151da57ceb1ca1">caching::reads</a> = 3,
<br />
  <a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852adec4ecca8ae1593f84eea4656599a693">caching::reads_and_metadata</a> = 5,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852aa181a603769c1f98ad927e7367c7aa51">caching::all</a> = 6,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852a9cd65f46f55fb6a4b198fcee6f0a63c1">caching::safety_barriers</a> = 7,
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852ad5197d93c063a2b1e22d1630a39b7aef">caching::temporary</a> = 8
<br />
}</td></tr>
<tr class="memdesc:aecd3a7db6cee3aec07d32fe6f99e6852"><td class="mdescLeft"> </td><td class="mdescRight">What i/o on the handle may complete immediately due to kernel caching. <a href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">More...</a><br /></td></tr>
<tr class="separator:aecd3a7db6cee3aec07d32fe6f99e6852"><td class="memSeparator" colspan="2"> </td></tr>
</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:aa0c1f1cf5c93c0e8eb36482710bef81d"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#aa0c1f1cf5c93c0e8eb36482710bef81d">QUICKCPPLIB_BITFIELD_BEGIN</a> (flag)</td></tr>
<tr class="memdesc:aa0c1f1cf5c93c0e8eb36482710bef81d"><td class="mdescLeft"> </td><td class="mdescRight">The behaviour of theprocess handle. <a href="classllfio__v2__xxx_1_1process__handle.html#aa0c1f1cf5c93c0e8eb36482710bef81d">More...</a><br /></td></tr>
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 </td><td class="memItemRight" valign="bottom"><b>QUICKCPPLIB_BITFIELD_END</b> (flag)</td></tr>
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constexpr </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a3d6579e76504d6752378fe3429ec53ec">process_handle</a> ()</td></tr>
<tr class="memdesc:a3d6579e76504d6752378fe3429ec53ec"><td class="mdescLeft"> </td><td class="mdescRight">Default constructor. <br /></td></tr>
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constexpr </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#aa8c4d7385696df6ffb5c1939bc970f55">process_handle</a> (<a class="el" href="structllfio__v2__xxx_1_1native__handle__type.html">native_handle_type</a> h, flag <a class="el" href="classllfio__v2__xxx_1_1handle.html#a013936bc1254b1a47567fe29698d1b1c">flags</a>=flag::none) noexcept</td></tr>
<tr class="memdesc:aa8c4d7385696df6ffb5c1939bc970f55"><td class="mdescLeft"> </td><td class="mdescRight">Construct a handle from a supplied native handle. <br /></td></tr>
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constexpr </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#aa036bc372d57e6be9dd4889f448f8c67">process_handle</a> (<a class="el" href="classllfio__v2__xxx_1_1handle.html">handle</a> &&o, flag <a class="el" href="classllfio__v2__xxx_1_1handle.html#a013936bc1254b1a47567fe29698d1b1c">flags</a>=flag::none) noexcept</td></tr>
<tr class="memdesc:aa036bc372d57e6be9dd4889f448f8c67"><td class="mdescLeft"> </td><td class="mdescRight">Explicit conversion from handle permitted. <br /></td></tr>
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 </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#adcf7e850514add6f1d82c5c40387cf8c">process_handle</a> (const <a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> &)=delete</td></tr>
<tr class="memdesc:adcf7e850514add6f1d82c5c40387cf8c"><td class="mdescLeft"> </td><td class="mdescRight">No copy construction (use clone()) <br /></td></tr>
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<a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#ac22d50fdb727fae3a6db0c40bd6c6583">operator=</a> (const <a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> &o)=delete</td></tr>
<tr class="memdesc:ac22d50fdb727fae3a6db0c40bd6c6583"><td class="mdescLeft"> </td><td class="mdescRight">No copy assignment. <br /></td></tr>
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constexpr </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#add1f8ef6ffad84d15c098c8e672f2c0e">process_handle</a> (<a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> &&o) noexcept</td></tr>
<tr class="memdesc:add1f8ef6ffad84d15c098c8e672f2c0e"><td class="mdescLeft"> </td><td class="mdescRight">Move the handle. <br /></td></tr>
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<a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a0960eb5b296746df2fd77be42e14fcd6">operator=</a> (<a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> &&o) noexcept</td></tr>
<tr class="memdesc:a0960eb5b296746df2fd77be42e14fcd6"><td class="mdescLeft"> </td><td class="mdescRight">Move assignment of handle. <br /></td></tr>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#ae3011c18dbedd50a95a4ee09750a8888">swap</a> (<a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> &o) noexcept</td></tr>
<tr class="memdesc:ae3011c18dbedd50a95a4ee09750a8888"><td class="mdescLeft"> </td><td class="mdescRight">Swap with another instance. <br /></td></tr>
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<tr class="memitem:a1d0b03dfcc6aa09f0fdba5ae6f794dd7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a1d0b03dfcc6aa09f0fdba5ae6f794dd7">in_pipe</a> () noexcept</td></tr>
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const <a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a9625e344aa94845353aaa144e13cf137">in_pipe</a> () const noexcept</td></tr>
<tr class="memdesc:a9625e344aa94845353aaa144e13cf137"><td class="mdescLeft"> </td><td class="mdescRight">This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. <br /></td></tr>
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<tr class="memitem:a79c79ca17f326098425fcae8dfb758aa"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a79c79ca17f326098425fcae8dfb758aa">error_pipe</a> () noexcept</td></tr>
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const <a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a2331582128de99fd5aa43958eb8bf5cd">error_pipe</a> () const noexcept</td></tr>
<tr class="memdesc:a2331582128de99fd5aa43958eb8bf5cd"><td class="mdescLeft"> </td><td class="mdescRight">This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. <br /></td></tr>
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<tr class="memitem:a632eac607e16b80ac3f7a24a04f72366"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a632eac607e16b80ac3f7a24a04f72366">out_pipe</a> () noexcept</td></tr>
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const <a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a8c86be2ef3bee1c3f9fc681b97937ceb">out_pipe</a> () const noexcept</td></tr>
<tr class="memdesc:a8c86be2ef3bee1c3f9fc681b97937ceb"><td class="mdescLeft"> </td><td class="mdescRight">This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. <br /></td></tr>
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result< void > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a1ddbce2629355ac9ca89eedcf5d75976">close_pipes</a> () noexcept</td></tr>
<tr class="memdesc:a1ddbce2629355ac9ca89eedcf5d75976"><td class="mdescLeft"> </td><td class="mdescRight">Close or release all the pipes, depending on <code>flag::release_pipes_on_close</code> <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a62c35c45a6d06a3b9f41620d0e6221a9">is_running</a> () const noexcept</td></tr>
<tr class="memdesc:a62c35c45a6d06a3b9f41620d0e6221a9"><td class="mdescLeft"> </td><td class="mdescRight">Returns true if the process is currently running. <br /></td></tr>
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<tr class="memitem:a8ed1f5dda9dcf9d59710acc9c91df943"><td class="memItemLeft" align="right" valign="top">virtual result< <a class="el" href="classllfio__v2__xxx_1_1handle.html#a33481bae57d9ccd0c97946416f9682f3">path_type</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a8ed1f5dda9dcf9d59710acc9c91df943">current_path</a> () const noexcept override</td></tr>
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virtual result< void > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a609e9dd06fb8f4c15d4cac17ecfa68d9">close</a> () noexcept override</td></tr>
<tr class="memdesc:a609e9dd06fb8f4c15d4cac17ecfa68d9"><td class="mdescLeft"> </td><td class="mdescRight">Immediately close this handle, possibly closing the pipes, possibly blocking until a child process exits. <br /></td></tr>
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<tr class="memitem:a1c35cffac69f00052d63de262acfc3c9"><td class="memItemLeft" align="right" valign="top">result< <a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a1c35cffac69f00052d63de262acfc3c9">clone</a> () const noexcept</td></tr>
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<tr class="memitem:ab64c9fc14fc555b5ec8571863458bf83"><td class="memItemLeft" align="right" valign="top">virtual result< void > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#ab64c9fc14fc555b5ec8571863458bf83">set_append_only</a> (bool) noexcept override</td></tr>
<tr class="memdesc:ab64c9fc14fc555b5ec8571863458bf83"><td class="mdescLeft"> </td><td class="mdescRight">EXTENSION: Changes whether this handle is append only or not. <a href="classllfio__v2__xxx_1_1process__handle.html#ab64c9fc14fc555b5ec8571863458bf83">More...</a><br /></td></tr>
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<tr class="memitem:ab158116bbd3d889cc4c06d205f14dca4"><td class="memItemLeft" align="right" valign="top">std::unique_ptr< span< <a class="el" href="classllfio__v2__xxx_1_1path__view__component.html">path_view_component</a> >, <a class="el" href="structllfio__v2__xxx_1_1process__handle_1_1__byte__array__deleter.html">_byte_array_deleter</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#ab158116bbd3d889cc4c06d205f14dca4">environment</a> () const noexcept</td></tr>
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<tr class="memitem:a2af6ecdb9948f3ddb05883d66cecbbb2"><td class="memItemLeft" align="right" valign="top">result< intptr_t > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a2af6ecdb9948f3ddb05883d66cecbbb2">wait</a> (<a class="el" href="structllfio__v2__xxx_1_1deadline.html">deadline</a> d={}) const noexcept</td></tr>
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template<class... Args> </td></tr>
<tr class="memitem:af247a46b6be5d4b89036883c4fbf6740"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><b>try_wait</b> (Args &&... args) noexcept</td></tr>
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template<class... Args, class Rep , class Period > </td></tr>
<tr class="memitem:a2940db04eeea67a2ec9d816135dbd536"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><b>try_wait_for</b> (Args &&... args, const std::chrono::duration< Rep, Period > &duration) noexcept</td></tr>
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template<class... Args, class Clock , class Duration > </td></tr>
<tr class="memitem:a8516637838bb68ecded754dc904430a6"><td class="memTemplItemLeft" align="right" valign="top">bool </td><td class="memTemplItemRight" valign="bottom"><b>try_wait_until</b> (Args &&... args, const std::chrono::time_point< Clock, Duration > &timeout) noexcept</td></tr>
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void </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a4716696b8700953889006251e0678aa4">swap</a> (<a class="el" href="classllfio__v2__xxx_1_1handle.html">handle</a> &o) noexcept</td></tr>
<tr class="memdesc:a4716696b8700953889006251e0678aa4"><td class="mdescLeft"> </td><td class="mdescRight">Swap with another instance. <br /></td></tr>
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virtual <a class="el" href="structllfio__v2__xxx_1_1native__handle__type.html">native_handle_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a1d273e38c061eb11f5012f624e9a202e">release</a> () noexcept</td></tr>
<tr class="memdesc:a1d273e38c061eb11f5012f624e9a202e"><td class="mdescLeft"> </td><td class="mdescRight">Release the native handle type managed by this handle. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a5c7f6a0a8ffdea22763c75a9319ba0c2">is_valid</a> () const noexcept</td></tr>
<tr class="memdesc:a5c7f6a0a8ffdea22763c75a9319ba0c2"><td class="mdescLeft"> </td><td class="mdescRight">True if the handle is valid (and usually open) <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a97e0884c27147b4929be98961b8e9254">is_readable</a> () const noexcept</td></tr>
<tr class="memdesc:a97e0884c27147b4929be98961b8e9254"><td class="mdescLeft"> </td><td class="mdescRight">True if the handle is readable. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a211fee447a47bdeb5424a2a5ae1de852">is_writable</a> () const noexcept</td></tr>
<tr class="memdesc:a211fee447a47bdeb5424a2a5ae1de852"><td class="mdescLeft"> </td><td class="mdescRight">True if the handle is writable. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#ac3aa3dc009822c0e437f317864534feb">is_append_only</a> () const noexcept</td></tr>
<tr class="memdesc:ac3aa3dc009822c0e437f317864534feb"><td class="mdescLeft"> </td><td class="mdescRight">True if the handle is append only. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#ade2416b9154d1e56937c99cd514324f8">is_multiplexable</a> () const noexcept</td></tr>
<tr class="memdesc:ade2416b9154d1e56937c99cd514324f8"><td class="mdescLeft"> </td><td class="mdescRight">True if multiplexable. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a501aa723172f6852e82738b0969278ae">is_nonblocking</a> () const noexcept</td></tr>
<tr class="memdesc:a501aa723172f6852e82738b0969278ae"><td class="mdescLeft"> </td><td class="mdescRight">True if nonblocking. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a695ce0ed1606d540cfa452790ea71632">is_seekable</a> () const noexcept</td></tr>
<tr class="memdesc:a695ce0ed1606d540cfa452790ea71632"><td class="mdescLeft"> </td><td class="mdescRight">True if seekable. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a751e912d8dab755ea969a418c1d544eb">requires_aligned_io</a> () const noexcept</td></tr>
<tr class="memdesc:a751e912d8dab755ea969a418c1d544eb"><td class="mdescLeft"> </td><td class="mdescRight">True if requires aligned i/o. <br /></td></tr>
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bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a7751fbb4b1aff527f469412ea33116ed">is_regular</a> () const noexcept</td></tr>
<tr class="memdesc:a7751fbb4b1aff527f469412ea33116ed"><td class="mdescLeft"> </td><td class="mdescRight">True if a regular file or device. <br /></td></tr>
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<tr class="memitem:a4ca48bdcd6d6bf8b41d0cebb304fe9ce"><td class="memItemLeft" align="right" valign="top"><a id="a4ca48bdcd6d6bf8b41d0cebb304fe9ce"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a4ca48bdcd6d6bf8b41d0cebb304fe9ce">is_directory</a> () const noexcept</td></tr>
<tr class="memdesc:a4ca48bdcd6d6bf8b41d0cebb304fe9ce"><td class="mdescLeft"> </td><td class="mdescRight">True if a directory. <br /></td></tr>
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<tr class="memitem:ae0d5de068f71628e9491c5669f89dca0"><td class="memItemLeft" align="right" valign="top"><a id="ae0d5de068f71628e9491c5669f89dca0"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#ae0d5de068f71628e9491c5669f89dca0">is_symlink</a> () const noexcept</td></tr>
<tr class="memdesc:ae0d5de068f71628e9491c5669f89dca0"><td class="mdescLeft"> </td><td class="mdescRight">True if a symlink. <br /></td></tr>
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<tr class="memitem:ac52242425f6e71c3fddcb6cdbe2c3b4e"><td class="memItemLeft" align="right" valign="top"><a id="ac52242425f6e71c3fddcb6cdbe2c3b4e"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#ac52242425f6e71c3fddcb6cdbe2c3b4e">is_pipe</a> () const noexcept</td></tr>
<tr class="memdesc:ac52242425f6e71c3fddcb6cdbe2c3b4e"><td class="mdescLeft"> </td><td class="mdescRight">True if a pipe. <br /></td></tr>
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<tr class="memitem:ac9280ab1e6f2a65bc73ee0cba5a8deea"><td class="memItemLeft" align="right" valign="top"><a id="ac9280ab1e6f2a65bc73ee0cba5a8deea"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#ac9280ab1e6f2a65bc73ee0cba5a8deea">is_socket</a> () const noexcept</td></tr>
<tr class="memdesc:ac9280ab1e6f2a65bc73ee0cba5a8deea"><td class="mdescLeft"> </td><td class="mdescRight">True if a socket. <br /></td></tr>
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<tr class="memitem:a018de0f7c177e3cff239016d14582e9a"><td class="memItemLeft" align="right" valign="top"><a id="a018de0f7c177e3cff239016d14582e9a"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a018de0f7c177e3cff239016d14582e9a">is_multiplexer</a> () const noexcept</td></tr>
<tr class="memdesc:a018de0f7c177e3cff239016d14582e9a"><td class="mdescLeft"> </td><td class="mdescRight">True if a multiplexer like BSD kqueues, Linux epoll or Windows IOCP. <br /></td></tr>
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<tr class="memitem:ade0d0e05b844e77f425669da87bf48bb"><td class="memItemLeft" align="right" valign="top"><a id="ade0d0e05b844e77f425669da87bf48bb"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#ade0d0e05b844e77f425669da87bf48bb">is_process</a> () const noexcept</td></tr>
<tr class="memdesc:ade0d0e05b844e77f425669da87bf48bb"><td class="mdescLeft"> </td><td class="mdescRight">True if a process. <br /></td></tr>
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<tr class="memitem:a354c9168af7759f7151a071c1e1b7b19"><td class="memItemLeft" align="right" valign="top"><a id="a354c9168af7759f7151a071c1e1b7b19"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a354c9168af7759f7151a071c1e1b7b19">is_section</a> () const noexcept</td></tr>
<tr class="memdesc:a354c9168af7759f7151a071c1e1b7b19"><td class="mdescLeft"> </td><td class="mdescRight">True if a memory section. <br /></td></tr>
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<tr class="memitem:a028fbead3b3c4d4eed2da7fa51c75036"><td class="memItemLeft" align="right" valign="top"><a id="a028fbead3b3c4d4eed2da7fa51c75036"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a028fbead3b3c4d4eed2da7fa51c75036">is_allocation</a> () const noexcept</td></tr>
<tr class="memdesc:a028fbead3b3c4d4eed2da7fa51c75036"><td class="mdescLeft"> </td><td class="mdescRight">True if a memory allocation. <br /></td></tr>
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<tr class="memitem:a90bf8668df002dac5a7d9397486b2946"><td class="memItemLeft" align="right" valign="top"><a id="a90bf8668df002dac5a7d9397486b2946"></a>
<a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">caching</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a90bf8668df002dac5a7d9397486b2946">kernel_caching</a> () const noexcept</td></tr>
<tr class="memdesc:a90bf8668df002dac5a7d9397486b2946"><td class="mdescLeft"> </td><td class="mdescRight">Kernel cache strategy used by this handle. <br /></td></tr>
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<tr class="memitem:a7126a726b2a06e4c1eca1a94c41163ff"><td class="memItemLeft" align="right" valign="top"><a id="a7126a726b2a06e4c1eca1a94c41163ff"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a7126a726b2a06e4c1eca1a94c41163ff">are_reads_from_cache</a> () const noexcept</td></tr>
<tr class="memdesc:a7126a726b2a06e4c1eca1a94c41163ff"><td class="mdescLeft"> </td><td class="mdescRight">True if the handle uses the kernel page cache for reads. <br /></td></tr>
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<tr class="memitem:a8036792f332459064172d7b0cfaee3cf"><td class="memItemLeft" align="right" valign="top"><a id="a8036792f332459064172d7b0cfaee3cf"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a8036792f332459064172d7b0cfaee3cf">are_writes_durable</a> () const noexcept</td></tr>
<tr class="memdesc:a8036792f332459064172d7b0cfaee3cf"><td class="mdescLeft"> </td><td class="mdescRight">True if writes are safely on storage on completion. <br /></td></tr>
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<tr class="memitem:a0a2a5896f5e373fa032cdae1c1fff2c1"><td class="memItemLeft" align="right" valign="top"><a id="a0a2a5896f5e373fa032cdae1c1fff2c1"></a>
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a0a2a5896f5e373fa032cdae1c1fff2c1">are_safety_barriers_issued</a> () const noexcept</td></tr>
<tr class="memdesc:a0a2a5896f5e373fa032cdae1c1fff2c1"><td class="mdescLeft"> </td><td class="mdescRight">True if issuing safety fsyncs is on. <br /></td></tr>
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<tr class="memitem:a013936bc1254b1a47567fe29698d1b1c"><td class="memItemLeft" align="right" valign="top"><a id="a013936bc1254b1a47567fe29698d1b1c"></a>
flag </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a013936bc1254b1a47567fe29698d1b1c">flags</a> () const noexcept</td></tr>
<tr class="memdesc:a013936bc1254b1a47567fe29698d1b1c"><td class="mdescLeft"> </td><td class="mdescRight">The flags this handle was opened with. <br /></td></tr>
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<tr class="memitem:a942b0d276c9f20fe41baab679b88fe72"><td class="memItemLeft" align="right" valign="top"><a id="a942b0d276c9f20fe41baab679b88fe72"></a>
<a class="el" href="structllfio__v2__xxx_1_1native__handle__type.html">native_handle_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1handle.html#a942b0d276c9f20fe41baab679b88fe72">native_handle</a> () const noexcept</td></tr>
<tr class="memdesc:a942b0d276c9f20fe41baab679b88fe72"><td class="mdescLeft"> </td><td class="mdescRight">The native handle used by this handle. <br /></td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr class="memitem:a9304f001b08fa64ae146e5bc44ecdeb9"><td class="memItemLeft" align="right" valign="top">static const <a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a9304f001b08fa64ae146e5bc44ecdeb9">current</a> () noexcept</td></tr>
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<tr class="memitem:a31aac80e9bf925a62485f618c892a40f"><td class="memItemLeft" align="right" valign="top">static result< <a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a31aac80e9bf925a62485f618c892a40f">launch_process</a> (<a class="el" href="classllfio__v2__xxx_1_1path__view.html">path_view</a> <a class="el" href="namespacellfio__v2__xxx.html#a49f7bb77eb38fbe1280019225b66b78b">path</a>, span< <a class="el" href="classllfio__v2__xxx_1_1path__view__component.html">path_view_component</a> > args, span< <a class="el" href="classllfio__v2__xxx_1_1path__view__component.html">path_view_component</a> > env= *<a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a9304f001b08fa64ae146e5bc44ecdeb9">current</a>().<a class="el" href="classllfio__v2__xxx_1_1process__handle.html#ab158116bbd3d889cc4c06d205f14dca4">environment</a>(), flag <a class="el" href="classllfio__v2__xxx_1_1handle.html#a013936bc1254b1a47567fe29698d1b1c">flags</a>=flag::wait_on_close) noexcept</td></tr>
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<tr class="memitem:ad9e7e0f8b50ba19ec635ff76b8b4ceb8"><td class="memItemLeft" align="right" valign="top"><a id="ad9e7e0f8b50ba19ec635ff76b8b4ceb8"></a>
static result< <a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="classllfio__v2__xxx_1_1process__handle.html#ad9e7e0f8b50ba19ec635ff76b8b4ceb8">launch_process</a> (<a class="el" href="classllfio__v2__xxx_1_1path__view.html">path_view</a> <a class="el" href="namespacellfio__v2__xxx.html#a49f7bb77eb38fbe1280019225b66b78b">path</a>, span< <a class="el" href="classllfio__v2__xxx_1_1path__view__component.html">path_view_component</a> > args, flag <a class="el" href="classllfio__v2__xxx_1_1handle.html#a013936bc1254b1a47567fe29698d1b1c">flags</a>=flag::wait_on_close) noexcept</td></tr>
<tr class="memdesc:ad9e7e0f8b50ba19ec635ff76b8b4ceb8"><td class="mdescLeft"> </td><td class="mdescRight">This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. <br /></td></tr>
<tr class="separator:ad9e7e0f8b50ba19ec635ff76b8b4ceb8"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-static-methods"></a>
Static Protected Member Functions</h2></td></tr>
<tr class="memitem:a1dd1abc0bd1fa1f10782301dddf802b7"><td class="memItemLeft" align="right" valign="top"><a id="a1dd1abc0bd1fa1f10782301dddf802b7"></a>
static constexpr void </td><td class="memItemRight" valign="bottom"><b>_set_caching</b> (<a class="el" href="structllfio__v2__xxx_1_1native__handle__type.html">native_handle_type</a> &nativeh, <a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">caching</a> <a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">caching</a>) noexcept</td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr class="memitem:a42f3c8e10d4906207309ce7ac96823df"><td class="memItemLeft" align="right" valign="top"><a id="a42f3c8e10d4906207309ce7ac96823df"></a>
flag </td><td class="memItemRight" valign="bottom"><b>_flags</b> {flag::none}</td></tr>
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<tr class="memitem:a874778af80effa5e41c2a1d2c6885960"><td class="memItemLeft" align="right" valign="top"><a id="a874778af80effa5e41c2a1d2c6885960"></a>
<a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> </td><td class="memItemRight" valign="bottom"><b>_in_pipe</b></td></tr>
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<tr class="memitem:a9cceb31bebf51f6b2fe78b236aa9bdb3"><td class="memItemLeft" align="right" valign="top"><a id="a9cceb31bebf51f6b2fe78b236aa9bdb3"></a>
<a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> </td><td class="memItemRight" valign="bottom"><b>_out_pipe</b></td></tr>
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<tr class="memitem:a42079a878b650f345630b33b3c928dee"><td class="memItemLeft" align="right" valign="top"><a id="a42079a878b650f345630b33b3c928dee"></a>
<a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a> </td><td class="memItemRight" valign="bottom"><b>_error_pipe</b></td></tr>
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<tr class="memitem:a1d6911771ac743fd9d64063c12429deb"><td class="memItemLeft" align="right" valign="top"><a id="a1d6911771ac743fd9d64063c12429deb"></a>
<a class="el" href="structllfio__v2__xxx_1_1native__handle__type.html">native_handle_type</a> </td><td class="memItemRight" valign="bottom"><b>_v</b></td></tr>
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</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A handle to this, or another, process. </p>
</div><h2 class="groupheader">Member Enumeration Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#aecd3a7db6cee3aec07d32fe6f99e6852">◆ </a></span>caching</h2>
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<td class="memname">enum <a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">llfio_v2_xxx::handle::caching</a> : unsigned char</td>
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<p>What i/o on the handle may complete immediately due to kernel caching. </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="aecd3a7db6cee3aec07d32fe6f99e6852a334c4a4c42fdb79d7ebc3e73b517e6f8"></a>none </td><td class="fielddoc"><p>No caching whatsoever, all reads and writes come from storage (i.e. <code>O_DIRECT|O_SYNC</code>). Align all i/o to 4Kb boundaries for this to work. <code>disable_safety_barriers</code> can be used here. </p>
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<tr><td class="fieldname"><a id="aecd3a7db6cee3aec07d32fe6f99e6852ab8a61dd00ce6fc5888706bda8fab2e98"></a>only_metadata </td><td class="fielddoc"><p>Cache reads and writes of metadata but avoid caching data (<code>O_DIRECT</code>), thus i/o here does not affect other cached data for other handles. Align all i/o to 4Kb boundaries for this to work. </p>
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<tr><td class="fieldname"><a id="aecd3a7db6cee3aec07d32fe6f99e6852a0fb9cf5f04f61bb6f1151da57ceb1ca1"></a>reads </td><td class="fielddoc"><p>Cache reads only. Writes of data and metadata do not complete until reaching storage (<code>O_SYNC</code>). <code>disable_safety_barriers</code> can be used here. </p>
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<tr><td class="fieldname"><a id="aecd3a7db6cee3aec07d32fe6f99e6852adec4ecca8ae1593f84eea4656599a693"></a>reads_and_metadata </td><td class="fielddoc"><p>Cache reads and writes of metadata, but writes of data do not complete until reaching storage (<code>O_DSYNC</code>). <code>disable_safety_barriers</code> can be used here. </p>
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<tr><td class="fieldname"><a id="aecd3a7db6cee3aec07d32fe6f99e6852aa181a603769c1f98ad927e7367c7aa51"></a>all </td><td class="fielddoc"><p>Cache reads and writes of data and metadata so they complete immediately, sending writes to storage at some point when the kernel decides (this is the default file system caching on a system). </p>
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<tr><td class="fieldname"><a id="aecd3a7db6cee3aec07d32fe6f99e6852a9cd65f46f55fb6a4b198fcee6f0a63c1"></a>safety_barriers </td><td class="fielddoc"><p>Cache reads and writes of data and metadata so they complete immediately, but issue safety barriers at certain points. See documentation for <code>disable_safety_barriers</code>. </p>
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<tr><td class="fieldname"><a id="aecd3a7db6cee3aec07d32fe6f99e6852ad5197d93c063a2b1e22d1630a39b7aef"></a>temporary </td><td class="fielddoc"><p>Cache reads and writes of data and metadata so they complete immediately, only sending any updates to storage on last handle close in the system or if memory becomes tight as this file is expected to be temporary (Windows and FreeBSD only). </p>
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<div class="fragment"><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  : <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <span class="comment">// bit 0 set means safety barriers enabled</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  unchanged = 0,</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  none = 1, <span class="comment">//!< No caching whatsoever, all reads and writes come from storage (i.e. <tt>O_DIRECT|O_SYNC</tt>). Align all i/o to 4Kb boundaries for this to work. <tt>disable_safety_barriers</tt> can be used here.</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"></span> only_metadata = 2, <span class="comment">//!< Cache reads and writes of metadata but avoid caching data (<tt>O_DIRECT</tt>), thus i/o here does not affect other cached data for other handles. Align all i/o to 4Kb boundaries for this to work.</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"></span> reads = 3, <span class="comment">//!< Cache reads only. Writes of data and metadata do not complete until reaching storage (<tt>O_SYNC</tt>). <tt>disable_safety_barriers</tt> can be used here.</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"></span> reads_and_metadata = 5, <span class="comment">//!< Cache reads and writes of metadata, but writes of data do not complete until reaching storage (<tt>O_DSYNC</tt>). <tt>disable_safety_barriers</tt> can be used here.</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"></span> all = 6, <span class="comment">//!< Cache reads and writes of data and metadata so they complete immediately, sending writes to storage at some point when the kernel decides (this is the default file system caching on a system).</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"></span> safety_barriers = 7, <span class="comment">//!< Cache reads and writes of data and metadata so they complete immediately, but issue safety barriers at certain points. See documentation for <tt>disable_safety_barriers</tt>.</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"></span> temporary = 8 <span class="comment">//!< Cache reads and writes of data and metadata so they complete immediately, only sending any updates to storage on last handle close in the system or if memory becomes tight as this file is expected to be temporary (Windows and FreeBSD only).</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"></span> <span class="comment">// NOTE: IF UPDATING THIS UPDATE THE std::ostream PRINTER BELOW!!!</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  };</div>
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<h2 class="memtitle"><span class="permalink"><a href="#af0b352d0f273ba6fa70c178b2c2fee42">◆ </a></span>creation</h2>
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<td class="memname">enum <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">llfio_v2_xxx::handle::creation</a> : unsigned char</td>
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<p>On opening, do we also create a new file or truncate an existing one? </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="af0b352d0f273ba6fa70c178b2c2fee42aa200dcd6176417e93be2405188ae7cc9"></a>open_existing </td><td class="fielddoc"><p>Filesystem entry must already exist. </p>
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<tr><td class="fieldname"><a id="af0b352d0f273ba6fa70c178b2c2fee42abba3bc579480e6c94ecd81b7b5923255"></a>only_if_not_exist </td><td class="fielddoc"><p>Filesystem entry must NOT exist, and is atomically created by the success of this operation. </p>
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<tr><td class="fieldname"><a id="af0b352d0f273ba6fa70c178b2c2fee42a8f0339e854eb5321306a443ce9199e1d"></a>if_needed </td><td class="fielddoc"><p>If filesystem entry exists that is used, else one is created. </p>
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<tr><td class="fieldname"><a id="af0b352d0f273ba6fa70c178b2c2fee42abb872caae430ba70f670508aca38feed"></a>truncate_existing </td><td class="fielddoc"><p>Filesystem entry must already exist. It is atomically truncated on open, leaving creation date and unique identifier unmodified. </p>
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<tr><td class="fieldname"><a id="af0b352d0f273ba6fa70c178b2c2fee42af7cf95e0f43dc8f79e39ae628c85a11d"></a>always_new </td><td class="fielddoc"><p>If filesystem entry exists, it is atomically replaced with a new inode, else a new entry is created. </p>
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<div class="fragment"><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  : <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  open_existing = 0, <span class="comment">//!< Filesystem entry must already exist</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"></span> only_if_not_exist, <span class="comment">//!< Filesystem entry must NOT exist, and is atomically created by the success of this operation</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"></span> if_needed, <span class="comment">//!< If filesystem entry exists that is used, else one is created</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"></span> truncate_existing, <span class="comment">//!< Filesystem entry must already exist. It is atomically truncated on open, leaving creation date and unique identifier unmodified.</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"></span> always_new <span class="comment">//!< If filesystem entry exists, it is atomically replaced with a new inode, else a new entry is created.</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"></span> <span class="comment">// NOTE: IF UPDATING THIS UPDATE THE std::ostream PRINTER BELOW!!!</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  };</div>
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<td class="memname">enum <a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">llfio_v2_xxx::handle::mode</a> : unsigned char</td>
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<p>The behaviour of the handle: does it read, read and write, or atomic append? </p>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="aa3930273a2d4cabbac309e0b75701dcaa334c4a4c42fdb79d7ebc3e73b517e6f8"></a>none </td><td class="fielddoc"><p>No ability to read or write anything, but can synchronise (SYNCHRONIZE or 0) </p>
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<tr><td class="fieldname"><a id="aa3930273a2d4cabbac309e0b75701dcaaa4daf6d1e8da35af49c33bbe9ee91d79"></a>attr_read </td><td class="fielddoc"><p>Ability to read attributes (FILE_READ_ATTRIBUTES|SYNCHRONIZE or O_RDONLY) </p>
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<tr><td class="fieldname"><a id="aa3930273a2d4cabbac309e0b75701dcaa9f56aff64cb748e078ab221474132d19"></a>attr_write </td><td class="fielddoc"><p>Ability to read and write attributes (FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|SYNCHRONIZE or O_RDONLY) </p>
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<tr><td class="fieldname"><a id="aa3930273a2d4cabbac309e0b75701dcaaecae13117d6f0584c25a9da6c8f8415e"></a>read </td><td class="fielddoc"><p>Ability to read (READ_CONTROL|FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA|SYNCHRONISE or O_RDONLY) </p>
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<tr><td class="fieldname"><a id="aa3930273a2d4cabbac309e0b75701dcaaefb2a684e4afb7d55e6147fbe5a332ee"></a>write </td><td class="fielddoc"><p>Ability to read and write (READ_CONTROL|FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA|FILE_WRITE_DATA|FILE_WRITE_ATTRIBUTES|FILE_WRITE_EA|FILE_APPEND_DATA|SYNCHRONISE or O_RDWR) </p>
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<tr><td class="fieldname"><a id="aa3930273a2d4cabbac309e0b75701dcaa9516dfb15f51c7ee19a4d46b8c0dbe1d"></a>append </td><td class="fielddoc"><p>All mainstream OSs and CIFS guarantee this is atomic with respect to all other appenders (FILE_APPEND_DATA|SYNCHRONISE or O_APPEND) </p>
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<div class="fragment"><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  : <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> <span class="comment">// bit 0 set means writable</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  unchanged = 0,</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  none = 2, <span class="comment">//!< No ability to read or write anything, but can synchronise (SYNCHRONIZE or 0)</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"></span> attr_read = 4, <span class="comment">//!< Ability to read attributes (FILE_READ_ATTRIBUTES|SYNCHRONIZE or O_RDONLY)</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"></span> attr_write = 5, <span class="comment">//!< Ability to read and write attributes (FILE_READ_ATTRIBUTES|FILE_WRITE_ATTRIBUTES|SYNCHRONIZE or O_RDONLY)</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"></span> <a class="code" href="namespacellfio__v2__xxx.html#af678f58d20e1f0962ff0744150342683">read</a> = 6, <span class="comment">//!< Ability to read (READ_CONTROL|FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA|SYNCHRONISE or O_RDONLY)</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"></span> <a class="code" href="namespacellfio__v2__xxx.html#a5a8908704c9988bbecc69c2359e6fd4a">write</a> = 7, <span class="comment">//!< Ability to read and write (READ_CONTROL|FILE_READ_DATA|FILE_READ_ATTRIBUTES|FILE_READ_EA|FILE_WRITE_DATA|FILE_WRITE_ATTRIBUTES|FILE_WRITE_EA|FILE_APPEND_DATA|SYNCHRONISE or O_RDWR)</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"></span> append = 9 <span class="comment">//!< All mainstream OSs and CIFS guarantee this is atomic with respect to all other appenders (FILE_APPEND_DATA|SYNCHRONISE or O_APPEND)</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"></span> <span class="comment">// NOTE: IF UPDATING THIS UPDATE THE std::ostream PRINTER BELOW!!!</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  };</div>
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<h2 class="groupheader">Member Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a1c35cffac69f00052d63de262acfc3c9">◆ </a></span>clone()</h2>
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<td class="memname">result<<a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a>> llfio_v2_xxx::process_handle::clone </td>
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<p>Clone this handle (copy constructor is disabled to avoid accidental copying)</p>
<dl class="section user"><dt>Errors returnable\n Any of the values POSIX dup() or DuplicateHandle() can return.</dt><dd></dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a9304f001b08fa64ae146e5bc44ecdeb9">◆ </a></span>current()</h2>
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<td class="memname">static const <a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a>& llfio_v2_xxx::process_handle::current </td>
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<p>Return a process handle referring to the current process. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a8ed1f5dda9dcf9d59710acc9c91df943">◆ </a></span>current_path()</h2>
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<td class="memname">virtual result<<a class="el" href="classllfio__v2__xxx_1_1handle.html#a33481bae57d9ccd0c97946416f9682f3">path_type</a>> llfio_v2_xxx::process_handle::current_path </td>
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<p>Returns the current path of the binary the process is executing.</p>
<dl class="section note"><dt>Note</dt><dd>If the <em>current</em> path cannot be retrieved on this platform (i.e. invariant to concurrent filesystem modification), an empty path is returned. This includes the current process. </dd></dl>
<p>Reimplemented from <a class="el" href="classllfio__v2__xxx_1_1handle.html#a00a85eec5a41f7edb2c574d40cf04535">llfio_v2_xxx::handle</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ab158116bbd3d889cc4c06d205f14dca4">◆ </a></span>environment()</h2>
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<td class="memname">std::unique_ptr<span<<a class="el" href="classllfio__v2__xxx_1_1path__view__component.html">path_view_component</a>>, <a class="el" href="structllfio__v2__xxx_1_1process__handle_1_1__byte__array__deleter.html">_byte_array_deleter</a>> llfio_v2_xxx::process_handle::environment </td>
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<p>Retrieves the current environment of the process.</p>
<dl class="section note"><dt>Note</dt><dd>If the <em>current</em> environment cannot be retrieved on this platform, a null pointer is returned. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a79c79ca17f326098425fcae8dfb758aa">◆ </a></span>error_pipe()</h2>
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<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a>& llfio_v2_xxx::process_handle::error_pipe </td>
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<p>A pipe with which one can read what another process writes to <code>stderr</code>, or by which this process can write to <code>stderr</code>. </p>
<div class="fragment"><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> { <span class="keywordflow">return</span> _error_pipe; }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a1d0b03dfcc6aa09f0fdba5ae6f794dd7">◆ </a></span>in_pipe()</h2>
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<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a>& llfio_v2_xxx::process_handle::in_pipe </td>
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<p>A pipe with which one can read what another process writes to <code>stdout</code>, or by which this process can read from <code>stdin</code>. Therefore always read-only. </p>
<div class="fragment"><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> { <span class="keywordflow">return</span> _in_pipe; }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a31aac80e9bf925a62485f618c892a40f">◆ </a></span>launch_process()</h2>
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<td class="memname">static result<<a class="el" href="classllfio__v2__xxx_1_1process__handle.html">process_handle</a>> llfio_v2_xxx::process_handle::launch_process </td>
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<td class="paramname"><em>env</em> = <code>*<a class="el" href="classllfio__v2__xxx_1_1process__handle.html#a9304f001b08fa64ae146e5bc44ecdeb9">current</a>().<a class="el" href="classllfio__v2__xxx_1_1process__handle.html#ab158116bbd3d889cc4c06d205f14dca4">environment</a>()</code>, </td>
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<p>Create a new process launching the binary at <code>path</code>. </p><dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">path</td><td>The absolute path to the binary to launch. </td></tr>
<tr><td class="paramname">args</td><td>An array of arguments to pass to the process. </td></tr>
<tr><td class="paramname">env</td><td>An array of environment variables to set for the process, which defaults to the current process' environment. </td></tr>
<tr><td class="paramname">flags</td><td>Any additional custom behaviours.</td></tr>
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<p>This is the only handle creation function in LLFIO which requires an absolute path. This is because no platform implements race-free process launch, and worse, there is no way of non-intrusively emulating race-free process launch either. So we accept the inevitable, launching child processes is always racy with respect to concurrent filesystem modification.</p>
<dl class="section user"><dt>Errors returnable\n Any of the values POSIX posix_spawn() or CreateProcess() can return.</dt><dd></dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a632eac607e16b80ac3f7a24a04f72366">◆ </a></span>out_pipe()</h2>
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<td class="memname"><a class="el" href="classllfio__v2__xxx_1_1pipe__handle.html">pipe_handle</a>& llfio_v2_xxx::process_handle::out_pipe </td>
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<p>A pipe with which one can write what another process reads from <code>stdin</code>, or by which this process can write to <code>stdout</code>. Therefore always write-only. </p>
<div class="fragment"><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> { <span class="keywordflow">return</span> _out_pipe; }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#aa0c1f1cf5c93c0e8eb36482710bef81d">◆ </a></span>QUICKCPPLIB_BITFIELD_BEGIN()</h2>
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<td class="memname">llfio_v2_xxx::process_handle::QUICKCPPLIB_BITFIELD_BEGIN </td>
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<p>The behaviour of theprocess handle. </p>
<p>< No flags</p>
<p>< Do not redirect the <code>stdin</code> for a launched process</p>
<p>< Do not redirect the <code>stdout</code> for a launched process</p>
<p>< Do not redirect the <code>stderr</code> for a launched process</p>
<p>< Wait for the process to exit in <code>.close()</code></p>
<p>< Release the pipes in <code>.close()</code>. They are closed otherwise.</p>
<p>< Do not create any redirected pipes as multiplexable</p>
<div class="fragment"><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  {none = 0U, <span class="comment">//!< No flags</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"></span> no_redirect_in_pipe = 1U << 1U, <span class="comment">//!< Do not redirect the `stdin` for a launched process</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"></span> no_redirect_out_pipe = 1U << 2U, <span class="comment">//!< Do not redirect the `stdout` for a launched process</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"></span> no_redirect_error_pipe = 1U << 3U, <span class="comment">//!< Do not redirect the `stderr` for a launched process</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"></span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  wait_on_close = 1U << 4U, <span class="comment">//!< Wait for the process to exit in `.close()`</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span> release_pipes_on_close = 1U << 5U, <span class="comment">//!< Release the pipes in `.close()`. They are closed otherwise.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"></span> no_multiplexable_pipes = 1U << 6U, <span class="comment">//!< Do not create any redirected pipes as multiplexable</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"></span> </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// NOTE: IF UPDATING THIS UPDATE THE std::ostream PRINTER BELOW!!!</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  no_redirect = no_redirect_in_pipe | no_redirect_out_pipe | no_redirect_error_pipe} QUICKCPPLIB_BITFIELD_END(flag);</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ab64c9fc14fc555b5ec8571863458bf83">◆ </a></span>set_append_only()</h2>
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<td class="memname">virtual result<void> llfio_v2_xxx::process_handle::set_append_only </td>
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<p>EXTENSION: Changes whether this handle is append only or not. </p>
<dl class="section warning"><dt>Warning</dt><dd>On Windows this is implemented as a bit of a hack to make it fast like on POSIX, so make sure you open the handle for read/write originally. Note unlike on POSIX the append_only disposition will be the only one toggled, seekable and readable will remain turned on.</dd></dl>
<dl class="section user"><dt>Errors returnable\n Whatever POSIX fcntl() returns. On Windows nothing is changed on the handle.</dt><dd></dd></dl>
<dl class="section user"><dt>Memory Allocations\n No memory allocation.</dt><dd></dd></dl>
<p>Reimplemented from <a class="el" href="classllfio__v2__xxx_1_1handle.html#a101620e9fff0c0e8c346af0e9de58b6a">llfio_v2_xxx::handle</a>.</p>
<div class="fragment"><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> { <span class="keywordflow">return</span> errc::operation_not_supported; }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a2af6ecdb9948f3ddb05883d66cecbbb2">◆ </a></span>wait()</h2>
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<td class="memname">result<intptr_t> llfio_v2_xxx::process_handle::wait </td>
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<p>Waits until a process exits, returning its exit code. </p>
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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="process__handle_8hpp.html">process_handle.hpp</a></li>
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<div class="ttc" id="anamespacellfio__v2__xxx_html_a5a8908704c9988bbecc69c2359e6fd4a"><div class="ttname"><a href="namespacellfio__v2__xxx.html#a5a8908704c9988bbecc69c2359e6fd4a">llfio_v2_xxx::write</a></div><div class="ttdeci">io_handle::io_result< io_handle::const_buffers_type > write(io_handle &self, io_handle::io_request< io_handle::const_buffers_type > reqs, deadline d=deadline()) noexcept</div><div class="ttdoc">Write data to the open handle.</div><div class="ttdef"><b>Definition:</b> io_handle.hpp:596</div></div>
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