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<div class="title">kvstore_v1_xxx::basic_key_value_store_info Struct Reference</div> </div>
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<p>Information about an available key value store implementation.
<a href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#details">More...</a></p>
<p><code>#include "kvstore.hpp"</code></p>
<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:a6a2745145078cb237fb385a7ad4681af"><td class="memItemLeft" align="right" valign="top"><a id="a6a2745145078cb237fb385a7ad4681af"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a6a2745145078cb237fb385a7ad4681af">uri_type</a> = std::basic_string< char ></td></tr>
<tr class="memdesc:a6a2745145078cb237fb385a7ad4681af"><td class="mdescLeft"> </td><td class="mdescRight">The type of the UTF-8 URI used by this store. <br /></td></tr>
<tr class="separator:a6a2745145078cb237fb385a7ad4681af"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3cae87f30ee5707ec5b9d96ab8d9c307"><td class="memItemLeft" align="right" valign="top"><a id="a3cae87f30ee5707ec5b9d96ab8d9c307"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a3cae87f30ee5707ec5b9d96ab8d9c307">extent_type</a> = llfio::file_handle::extent_type</td></tr>
<tr class="memdesc:a3cae87f30ee5707ec5b9d96ab8d9c307"><td class="mdescLeft"> </td><td class="mdescRight">The value extent type used by this store. <br /></td></tr>
<tr class="separator:a3cae87f30ee5707ec5b9d96ab8d9c307"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a53700b762910c0189fd240e4bc51508a"><td class="memItemLeft" align="right" valign="top"><a id="a53700b762910c0189fd240e4bc51508a"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a53700b762910c0189fd240e4bc51508a">size_type</a> = llfio::file_handle::size_type</td></tr>
<tr class="memdesc:a53700b762910c0189fd240e4bc51508a"><td class="mdescLeft"> </td><td class="mdescRight">The memory extent type used by this store. <br /></td></tr>
<tr class="separator:a53700b762910c0189fd240e4bc51508a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a22d02c2c96725ea238c5eed0e7a80c85"><td class="memItemLeft" align="right" valign="top"><a id="a22d02c2c96725ea238c5eed0e7a80c85"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a22d02c2c96725ea238c5eed0e7a80c85">handle_type</a> = <a class="el" href="classllfio__v2__xxx_1_1file__handle.html">llfio::file_handle</a></td></tr>
<tr class="memdesc:a22d02c2c96725ea238c5eed0e7a80c85"><td class="mdescLeft"> </td><td class="mdescRight">The handle type used by this store. <br /></td></tr>
<tr class="separator:a22d02c2c96725ea238c5eed0e7a80c85"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2c1743edd93e794407f21911c9f72483"><td class="memItemLeft" align="right" valign="top"><a id="a2c1743edd93e794407f21911c9f72483"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a2c1743edd93e794407f21911c9f72483">mode</a> = <a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">handle_type::mode</a></td></tr>
<tr class="memdesc:a2c1743edd93e794407f21911c9f72483"><td class="mdescLeft"> </td><td class="mdescRight">The mode used by this store. <br /></td></tr>
<tr class="separator:a2c1743edd93e794407f21911c9f72483"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a34ccd51edd7cf9321451d4ed38fa22d8"><td class="memItemLeft" align="right" valign="top"><a id="a34ccd51edd7cf9321451d4ed38fa22d8"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a34ccd51edd7cf9321451d4ed38fa22d8">creation</a> = <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">handle_type::creation</a></td></tr>
<tr class="memdesc:a34ccd51edd7cf9321451d4ed38fa22d8"><td class="mdescLeft"> </td><td class="mdescRight">The creation used by this store. <br /></td></tr>
<tr class="separator:a34ccd51edd7cf9321451d4ed38fa22d8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad6c528fa5be3528fec4eaf804836f26c"><td class="memItemLeft" align="right" valign="top"><a id="ad6c528fa5be3528fec4eaf804836f26c"></a>
using </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#ad6c528fa5be3528fec4eaf804836f26c">caching</a> = <a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">handle_type::caching</a></td></tr>
<tr class="memdesc:ad6c528fa5be3528fec4eaf804836f26c"><td class="mdescLeft"> </td><td class="mdescRight">The kernel caching used by this store. <br /></td></tr>
<tr class="separator:ad6c528fa5be3528fec4eaf804836f26c"><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:a71bf22a199b1f8461e9612269eb2cf29"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a71bf22a199b1f8461e9612269eb2cf29">QUICKCPPLIB_BITFIELD_BEGIN</a> (features)</td></tr>
<tr class="memdesc:a71bf22a199b1f8461e9612269eb2cf29"><td class="mdescLeft"> </td><td class="mdescRight">Features requested, or provided by, this store. <a href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a71bf22a199b1f8461e9612269eb2cf29">More...</a><br /></td></tr>
<tr class="separator:a71bf22a199b1f8461e9612269eb2cf29"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a74806d5aad24bdf1607755aefd8d70b4"><td class="memItemLeft" align="right" valign="top"><a id="a74806d5aad24bdf1607755aefd8d70b4"></a>
 </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a74806d5aad24bdf1607755aefd8d70b4">QUICKCPPLIB_BITFIELD_END</a> (features) features features</td></tr>
<tr class="memdesc:a74806d5aad24bdf1607755aefd8d70b4"><td class="mdescLeft"> </td><td class="mdescRight">The features this store implementation provides. <br /></td></tr>
<tr class="separator:a74806d5aad24bdf1607755aefd8d70b4"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
Public Attributes</h2></td></tr>
<tr class="memitem:aa89f3aa72d3cfd207242e7ef4ad853ed"><td class="memItemLeft" align="right" valign="top"><a id="aa89f3aa72d3cfd207242e7ef4ad853ed"></a>
const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#aa89f3aa72d3cfd207242e7ef4ad853ed">name</a></td></tr>
<tr class="memdesc:aa89f3aa72d3cfd207242e7ef4ad853ed"><td class="mdescLeft"> </td><td class="mdescRight">The name of this store implementation. <br /></td></tr>
<tr class="separator:aa89f3aa72d3cfd207242e7ef4ad853ed"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a3a48e754b1f0ccb700a1d17663f0bbb4"><td class="memItemLeft" align="right" valign="top"><a id="a3a48e754b1f0ccb700a1d17663f0bbb4"></a>
<a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a53700b762910c0189fd240e4bc51508a">size_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a3a48e754b1f0ccb700a1d17663f0bbb4">min_key_size</a></td></tr>
<tr class="memdesc:a3a48e754b1f0ccb700a1d17663f0bbb4"><td class="mdescLeft"> </td><td class="mdescRight">The minimum key size, in bytes, supported. <br /></td></tr>
<tr class="separator:a3a48e754b1f0ccb700a1d17663f0bbb4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a55c5a2ab7632d6d6364ecabb96e97bee"><td class="memItemLeft" align="right" valign="top"><a id="a55c5a2ab7632d6d6364ecabb96e97bee"></a>
<a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a53700b762910c0189fd240e4bc51508a">size_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a55c5a2ab7632d6d6364ecabb96e97bee">max_key_size</a></td></tr>
<tr class="memdesc:a55c5a2ab7632d6d6364ecabb96e97bee"><td class="mdescLeft"> </td><td class="mdescRight">The maximum key size, in bytes, supported. <br /></td></tr>
<tr class="separator:a55c5a2ab7632d6d6364ecabb96e97bee"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a413b348bd19556537cd4ff287b937b0a"><td class="memItemLeft" align="right" valign="top"><a id="a413b348bd19556537cd4ff287b937b0a"></a>
<a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a3cae87f30ee5707ec5b9d96ab8d9c307">extent_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a413b348bd19556537cd4ff287b937b0a">min_value_size</a></td></tr>
<tr class="memdesc:a413b348bd19556537cd4ff287b937b0a"><td class="mdescLeft"> </td><td class="mdescRight">The minimum value size, in bytes, supported. <br /></td></tr>
<tr class="separator:a413b348bd19556537cd4ff287b937b0a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a860380a3823942caabac91e2d819b781"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a3cae87f30ee5707ec5b9d96ab8d9c307">extent_type</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a860380a3823942caabac91e2d819b781">max_value_size</a></td></tr>
<tr class="separator:a860380a3823942caabac91e2d819b781"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a42ce844ff625bc9912a30d0fac3c5f45"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a42ce844ff625bc9912a30d0fac3c5f45">score</a> )(const <a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a6a2745145078cb237fb385a7ad4681af">uri_type</a> &uri, <a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">handle_type::mode</a>, <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">handle_type::creation</a> <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">creation</a>)</td></tr>
<tr class="separator:a42ce844ff625bc9912a30d0fac3c5f45"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa52a30f6b8dafd8720fb6b19d7df3847"><td class="memItemLeft" align="right" valign="top">result< <a class="el" href="classkvstore__v1__xxx_1_1basic__key__value__store.html">basic_key_value_store</a> >(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#aa52a30f6b8dafd8720fb6b19d7df3847">create</a> )(const <a class="el" href="classkvstore__v1__xxx_1_1basic__key__value__store.html#a230f8e3e03df31d6647e4544853b1502">basic_key_value_store::uri_type</a> &uri, <a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a53700b762910c0189fd240e4bc51508a">size_type</a> key_size, features _features, <a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">mode</a> _mode, <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">creation</a> _creation, <a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">caching</a> _caching)</td></tr>
<tr class="separator:aa52a30f6b8dafd8720fb6b19d7df3847"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Information about an available key value store implementation. </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a71bf22a199b1f8461e9612269eb2cf29"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a71bf22a199b1f8461e9612269eb2cf29">◆ </a></span>QUICKCPPLIB_BITFIELD_BEGIN()</h2>
<div class="memitem">
<div class="memproto">
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
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<td class="memname">kvstore_v1_xxx::basic_key_value_store_info::QUICKCPPLIB_BITFIELD_BEGIN </td>
<td>(</td>
<td class="paramtype">features </td>
<td class="paramname"></td><td>)</td>
<td></td>
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<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
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<p>Features requested, or provided by, this store. </p>
<p>< Bare key-value store. Very likely to choose a hardware implementation, if one is available.</p>
<p>< Use a single shared memory region for storage. Note that keys and value sizes freeze after URI fetch.</p>
<p>< A certain amount of history of previous valid states of the store is kept such that a previously valid state can always be restored after sudden power loss.</p>
<p>< Updates do not appear to modify any pinned value.</p>
<p>< Updates do not appear to remove any pinned keys.</p>
<p>< In-place partial updates are recorded as change deltas.</p>
<p>< The ability to pin the value of more than one key in an atomic snapshot.</p>
<p>< The ability to update many items with dependencies on other items as a single, all-or-nothing, change.</p>
<div class="fragment"><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  {</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  none = 1U << 0U, <span class="comment">//!< Bare key-value store. Very likely to choose a hardware implementation, if one is available.</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"></span> shared_memory = 1U << 1U, <span class="comment">//!< Use a single shared memory region for storage. Note that keys and value sizes freeze after URI fetch.</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"></span> history = 1U << 2U, <span class="comment">//!< A certain amount of history of previous valid states of the store is kept such that a previously valid state can always be restored after sudden power loss.</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"></span> stable_values = 1U << 3U, <span class="comment">//!< Updates do not appear to modify any pinned value.</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"></span> stable_keys = 1U << 4U, <span class="comment">//!< Updates do not appear to remove any pinned keys.</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"></span> update_deltas = 1U << 5U, <span class="comment">//!< In-place partial updates are recorded as change deltas.</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"></span> atomic_snapshots = 1U << 6U, <span class="comment">//!< The ability to pin the value of more than one key in an atomic snapshot.</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"></span> atomic_transactions = 1U << 7U <span class="comment">//!< The ability to update many items with dependencies on other items as a single, all-or-nothing, change.</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"></span> }</div>
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<h2 class="groupheader">Member Data Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#aa52a30f6b8dafd8720fb6b19d7df3847">◆ </a></span>create</h2>
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<td class="memname">result<<a class="el" href="classkvstore__v1__xxx_1_1basic__key__value__store.html">basic_key_value_store</a>>(* kvstore_v1_xxx::basic_key_value_store_info::create) (const <a class="el" href="classkvstore__v1__xxx_1_1basic__key__value__store.html#a230f8e3e03df31d6647e4544853b1502">basic_key_value_store::uri_type</a> &uri, <a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a53700b762910c0189fd240e4bc51508a">size_type</a> key_size, features _features, <a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">mode</a> _mode, <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">creation</a> _creation, <a class="el" href="classllfio__v2__xxx_1_1handle.html#aecd3a7db6cee3aec07d32fe6f99e6852">caching</a> _caching)</td>
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<p>Construct a store implementation. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a860380a3823942caabac91e2d819b781">◆ </a></span>max_value_size</h2>
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<td class="memname"><a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a3cae87f30ee5707ec5b9d96ab8d9c307">extent_type</a> kvstore_v1_xxx::basic_key_value_store_info::max_value_size</td>
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<p>The maximum value size, in bytes, supported. </p>
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<td class="memname">int(* kvstore_v1_xxx::basic_key_value_store_info::score) (const <a class="el" href="structkvstore__v1__xxx_1_1basic__key__value__store__info.html#a6a2745145078cb237fb385a7ad4681af">uri_type</a> &uri, <a class="el" href="classllfio__v2__xxx_1_1handle.html#aa3930273a2d4cabbac309e0b75701dca">handle_type::mode</a>, <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">handle_type::creation</a> <a class="el" href="classllfio__v2__xxx_1_1handle.html#af0b352d0f273ba6fa70c178b2c2fee42">creation</a>)</td>
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<p>Examine the specified URI for suitability for this store implementation. Zero means that the URI location is suitable, but the format at that location is not compatible. Negative means the URI location is not possible. Higher positive scores outrank other positive scores. </p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>include/kvstore/<a class="el" href="kvstore_8hpp.html">kvstore.hpp</a></li>
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