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<li class="navelem"><a class="el" href="dir_df9c78dcf3f59a33b12284f95992a64b.html">ripple</a></li><li class="navelem"><a class="el" href="dir_380eda8174f5eb060d37b8b034a94866.html">shamap</a></li> </ul>
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<div class="title">SHAMapItem.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//------------------------------------------------------------------------------</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> This file is part of rippled: https://github.com/ripple/rippled</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (c) 2012, 2013 Ripple Labs Inc.</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> Permission to use, copy, modify, and/or distribute this software for any</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> purpose with or without fee is hereby granted, provided that the above</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> copyright notice and this permission notice appear in all copies.</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">//==============================================================================</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#ifndef RIPPLE_SHAMAP_SHAMAPITEM_H_INCLUDED</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define RIPPLE_SHAMAP_SHAMAPITEM_H_INCLUDED</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <ripple/basics/ByteUtilities.h></span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <ripple/basics/CountedObject.h></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <ripple/basics/SlabAllocator.h></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <ripple/basics/Slice.h></span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <ripple/basics/base_uint.h></span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <boost/smart_ptr/intrusive_ptr.hpp></span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/cassert.html">cassert</a>></span></div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">namespace </span><a class="code" href="namespaceripple.html">ripple</a> {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  </div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">// an item stored in a SHAMap</span></div>
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<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html"> 34</a></span> <span class="keyword">class </span><a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> : <span class="keyword">public</span> <a class="code" href="classripple_1_1CountedObject.html">CountedObject</a><SHAMapItem></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">// These are used to support boost::intrusive_ptr reference counting</span></div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="comment">// These functions are used internally by boost::intrusive_ptr to handle</span></div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="comment">// lifetime management.</span></div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">friend</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="classripple_1_1SHAMapItem.html#a4ac1b741513378aaa260f7118f1f85b3">intrusive_ptr_add_ref</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> <span class="keyword">const</span>* x);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keyword">friend</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <a class="code" href="classripple_1_1SHAMapItem.html#a998cc5875809d78f5afbd599c4cf409f">intrusive_ptr_release</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> <span class="keyword">const</span>* x);</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// This is the interface for creating new instances of this class.</span></div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">friend</span> boost::intrusive_ptr<SHAMapItem></div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="classripple_1_1SHAMapItem.html#a167b4d4f68841afdb25e029faf254e9a">make_shamapitem</a>(<a class="code" href="classripple_1_1base__uint.html">uint256</a> <span class="keyword">const</span>& tag, <a class="code" href="classripple_1_1Slice.html">Slice</a> <a class="code" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">data</a>);</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#abf90ca9bd7d9c5ce0a17e7f58cca2b91"> 50</a></span>  <a class="code" href="classripple_1_1base__uint.html">uint256</a> <span class="keyword">const</span> <a class="code" href="classripple_1_1SHAMapItem.html#abf90ca9bd7d9c5ce0a17e7f58cca2b91">tag_</a>;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  </div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// We use std::uint32_t to minimize the size; there's no SHAMapItem whose</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="comment">// size exceeds 4GB and there won't ever be (famous last words?), so this</span></div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// is safe.</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#a18904203010378c5212d89e30ed66044"> 55</a></span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint32_t</a> <span class="keyword">const</span> <a class="code" href="classripple_1_1SHAMapItem.html#a18904203010378c5212d89e30ed66044">size_</a>;</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  </div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// This is the reference count used to support boost::intrusive_ptr</span></div>
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<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#ad2831484014eca794c5c9e39258b39f2"> 58</a></span>  <span class="keyword">mutable</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/atomic/atomic.html">std::atomic<std::uint32_t></a> <a class="code" href="classripple_1_1SHAMapItem.html#ad2831484014eca794c5c9e39258b39f2">refcount_</a> = 1;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// Because of the unusual way in which SHAMapItem objects are constructed</span></div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// the only way to properly create one is to first allocate enough memory</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// so we limit this constructor to codepaths that do this right and limit</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// arbitrary construction.</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#a90d7b0c93cfd51acdf151eba40fee683"> 64</a></span>  <a class="code" href="classripple_1_1SHAMapItem.html#a90d7b0c93cfd51acdf151eba40fee683">SHAMapItem</a>(<a class="code" href="classripple_1_1base__uint.html">uint256</a> <span class="keyword">const</span>& tag, <a class="code" href="classripple_1_1Slice.html">Slice</a> <a class="code" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">data</a>)</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  : <a class="code" href="classripple_1_1SHAMapItem.html#abf90ca9bd7d9c5ce0a17e7f58cca2b91">tag_</a>(tag), <a class="code" href="classripple_1_1SHAMapItem.html#a18904203010378c5212d89e30ed66044">size_</a>(static_cast<<a class="code" href="namespacestd.html">std</a>::uint32_t>(<a class="code" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">data</a>.<a class="code" href="classripple_1_1SHAMapItem.html#ad322c63f7fbe6a84fa9e77715115f7a3">size</a>()))</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  {</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">std::memcpy</a>(</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">reinterpret_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>*<span class="keyword">></span>(<span class="keyword">this</span>) + <span class="keyword">sizeof</span>(*<span class="keyword">this</span>),</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">data</a>.data(),</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="code" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">data</a>.size());</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  </div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="classripple_1_1SHAMapItem.html#aaaf776384dd9ec074a4c85cf70d47f35">SHAMapItem</a>() = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <a class="code" href="classripple_1_1SHAMapItem.html#aaaf776384dd9ec074a4c85cf70d47f35">SHAMapItem</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> <span class="keyword">const</span>& other) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a>&</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="classripple_1_1SHAMapItem.html#a3ae021fa94adfc1487139e053f272172">operator=</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> <span class="keyword">const</span>& other) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <a class="code" href="classripple_1_1SHAMapItem.html#aaaf776384dd9ec074a4c85cf70d47f35">SHAMapItem</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a>&& other) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  </div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a>&</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <a class="code" href="classripple_1_1SHAMapItem.html#a3ae021fa94adfc1487139e053f272172">operator=</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a>&&) = <span class="keyword">delete</span>;</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <a class="code" href="classripple_1_1base__uint.html">uint256</a> <span class="keyword">const</span>&</div>
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<div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#a9d92059f2308f9fe008ad5cfbc7d9478"> 87</a></span>  <a class="code" href="classripple_1_1SHAMapItem.html#a9d92059f2308f9fe008ad5cfbc7d9478">key</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1SHAMapItem.html#abf90ca9bd7d9c5ce0a17e7f58cca2b91">tag_</a>;</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  }</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a></div>
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<div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#ad322c63f7fbe6a84fa9e77715115f7a3"> 93</a></span>  <a class="code" href="classripple_1_1SHAMapItem.html#ad322c63f7fbe6a84fa9e77715115f7a3">size</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1SHAMapItem.html#a18904203010378c5212d89e30ed66044">size_</a>;</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  </div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">void</span> <span class="keyword">const</span>*</div>
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<div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d"> 99</a></span>  <a class="code" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">data</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> <span class="keyword">reinterpret_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a> const*<span class="keyword">></span>(<span class="keyword">this</span>) + <span class="keyword">sizeof</span>(*<span class="keyword">this</span>);</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  }</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  </div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="classripple_1_1Slice.html">Slice</a></div>
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<div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="classripple_1_1SHAMapItem.html#a3f52867a7d3829faede60bf7dd5628ba"> 105</a></span>  <a class="code" href="classripple_1_1SHAMapItem.html#a3f52867a7d3829faede60bf7dd5628ba">slice</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword"> </span>{</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> {<a class="code" href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">data</a>(), <a class="code" href="classripple_1_1SHAMapItem.html#ad322c63f7fbe6a84fa9e77715115f7a3">size</a>()};</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> };</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  </div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="keyword">namespace </span>detail {</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">// clang-format off</span></div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment">// The slab cutoffs and the number of megabytes per allocation are customized</span></div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">// based on the number of objects of each size we expect to need at any point</span></div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment">// in time and with an eye to minimize the number of slack bytes in a block.</span></div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">inline</span> SlabAllocatorSet<SHAMapItem> <a class="code" href="namespaceripple_1_1detail.html#ae9da365be7da5573d9c1c353af6eb470">slabber</a>({</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  { 128, <a class="code" href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">megabytes</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a>(60)) },</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  { 192, <a class="code" href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">megabytes</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a>(46)) },</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  { 272, <a class="code" href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">megabytes</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a>(60)) },</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  { 384, <a class="code" href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">megabytes</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a>(56)) },</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  { 564, <a class="code" href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">megabytes</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a>(40)) },</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  { 772, <a class="code" href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">megabytes</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a>(46)) },</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  { 1052, <a class="code" href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">megabytes</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a>(60)) },</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> });</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// clang-format on</span></div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  </div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> } <span class="comment">// namespace detail</span></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  </div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="keyword">inline</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00131"></a><span class="lineno"><a class="line" href="namespaceripple.html#ad0655e5196cc0b5add7afefc2688d1e3"> 131</a></span> <a class="code" href="namespaceripple.html#ad0655e5196cc0b5add7afefc2688d1e3">intrusive_ptr_add_ref</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> <span class="keyword">const</span>* x)</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> {</div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">// This can only happen if someone releases the last reference to the</span></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="comment">// item while we were trying to increment the refcount.</span></div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">if</span> (x-><a class="code" href="classripple_1_1SHAMapItem.html#ad2831484014eca794c5c9e39258b39f2">refcount_</a>++ == 0)</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="namespaceripple.html#aefd2f77338ce3c9a2fffc4f0b289b483">LogicError</a>(<span class="stringliteral">"SHAMapItem: the reference count is 0!"</span>);</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> }</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  </div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keyword">inline</span> <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00140"></a><span class="lineno"><a class="line" href="namespaceripple.html#a42add542723b31666227194e46020f4b"> 140</a></span> <a class="code" href="namespaceripple.html#a42add542723b31666227194e46020f4b">intrusive_ptr_release</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> <span class="keyword">const</span>* x)</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> {</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">if</span> (--x-><a class="code" href="classripple_1_1SHAMapItem.html#ad2831484014eca794c5c9e39258b39f2">refcount_</a> == 0)</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  {</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">auto</span> p = <span class="keyword">reinterpret_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a> const*<span class="keyword">></span>(x);</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  </div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">// The SHAMapItem constuctor isn't trivial (because the destructor</span></div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="comment">// for CountedObject isn't) so we can't avoid calling it here, but</span></div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">// plan for a future where we might not need to.</span></div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">if</span> constexpr (!std::is_trivially_destructible_v<SHAMapItem>)</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/memory/destroy_at.html">std::destroy_at</a>(x);</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  </div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// If the slabber doens't claim this pointer, it was allocated</span></div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="comment">// manually, so we free it manually.</span></div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespaceripple_1_1detail.html#ae9da365be7da5573d9c1c353af6eb470">detail::slabber</a>.deallocate(<span class="keyword">const_cast<</span><a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>*<span class="keyword">></span>(p)))</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">delete</span>[] p;</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> }</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  </div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="keyword">inline</span> boost::intrusive_ptr<SHAMapItem></div>
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<div class="line"><a name="l00160"></a><span class="lineno"><a class="line" href="namespaceripple.html#a0f98a7a60d7fb0c39572419ac15c959f"> 160</a></span> <a class="code" href="namespaceripple.html#a0f98a7a60d7fb0c39572419ac15c959f">make_shamapitem</a>(<a class="code" href="classripple_1_1base__uint.html">uint256</a> <span class="keyword">const</span>& tag, <a class="code" href="classripple_1_1Slice.html">Slice</a> data)</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> {</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  assert(data.size() <= megabytes<std::size_t>(16));</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>* raw = <a class="code" href="namespaceripple_1_1detail.html#ae9da365be7da5573d9c1c353af6eb470">detail::slabber</a>.allocate(data.size());</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  </div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="comment">// If we can't grab memory from the slab allocators, we fall back to</span></div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">// the standard library and try to grab a precisely-sized memory block:</span></div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">if</span> (raw == <span class="keyword">nullptr</span>)</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  raw = <span class="keyword">new</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint8_t</a>[<span class="keyword">sizeof</span>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a>) + data.size()];</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  </div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="comment">// We do not increment the reference count here on purpose: the</span></div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="comment">// constructor of SHAMapItem explicitly sets it to 1. We use the fact</span></div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">// that the refcount can never be zero before incrementing as an</span></div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="comment">// invariant.</span></div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">return</span> {<span class="keyword">new</span> (raw) <a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a>{tag, data}, <span class="keyword">false</span>};</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> }</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  </div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> static_assert(<span class="keyword">alignof</span>(SHAMapItem) != 40);</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> static_assert(<span class="keyword">alignof</span>(SHAMapItem) == 8 || <span class="keyword">alignof</span>(SHAMapItem) == 4);</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  </div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="keyword">inline</span> boost::intrusive_ptr<SHAMapItem></div>
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<div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="namespaceripple.html#a9bd498c2d480ac22ebe7ebf5ff230193"> 182</a></span> <a class="code" href="namespaceripple.html#a0f98a7a60d7fb0c39572419ac15c959f">make_shamapitem</a>(<a class="code" href="classripple_1_1SHAMapItem.html">SHAMapItem</a> <span class="keyword">const</span>& other)</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> {</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceripple.html#a0f98a7a60d7fb0c39572419ac15c959f">make_shamapitem</a>(other.<a class="code" href="classripple_1_1SHAMapItem.html#a9d92059f2308f9fe008ad5cfbc7d9478">key</a>(), other.<a class="code" href="classripple_1_1SHAMapItem.html#a3f52867a7d3829faede60bf7dd5628ba">slice</a>());</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> }</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  </div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> } <span class="comment">// namespace ripple</span></div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  </div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="preprocessor">#endif</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a4ac1b741513378aaa260f7118f1f85b3"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a4ac1b741513378aaa260f7118f1f85b3">ripple::SHAMapItem::intrusive_ptr_add_ref</a></div><div class="ttdeci">friend void intrusive_ptr_add_ref(SHAMapItem const *x)</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00131">SHAMapItem.h:131</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_abb9566a5f6f2bed04bfabafe5251993d"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#abb9566a5f6f2bed04bfabafe5251993d">ripple::SHAMapItem::data</a></div><div class="ttdeci">void const * data() const</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00099">SHAMapItem.h:99</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_aaaf776384dd9ec074a4c85cf70d47f35"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#aaaf776384dd9ec074a4c85cf70d47f35">ripple::SHAMapItem::SHAMapItem</a></div><div class="ttdeci">SHAMapItem()=delete</div></div>
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<div class="ttc" id="aclassripple_1_1CountedObject_html"><div class="ttname"><a href="classripple_1_1CountedObject.html">ripple::CountedObject</a></div><div class="ttdoc">Tracks the number of instances of an object.</div><div class="ttdef"><b>Definition:</b> <a href="CountedObject_8h_source.html#l00124">CountedObject.h:124</a></div></div>
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<div class="ttc" id="adestroy_at_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/memory/destroy_at.html">std::destroy_at</a></div><div class="ttdeci">T destroy_at(T... args)</div></div>
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<div class="ttc" id="aclassripple_1_1Slice_html"><div class="ttname"><a href="classripple_1_1Slice.html">ripple::Slice</a></div><div class="ttdoc">An immutable linear range of bytes.</div><div class="ttdef"><b>Definition:</b> <a href="Slice_8h_source.html#l00044">Slice.h:44</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a0f98a7a60d7fb0c39572419ac15c959f"><div class="ttname"><a href="namespaceripple.html#a0f98a7a60d7fb0c39572419ac15c959f">ripple::make_shamapitem</a></div><div class="ttdeci">boost::intrusive_ptr< SHAMapItem > make_shamapitem(uint256 const &tag, Slice data)</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00160">SHAMapItem.h:160</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a3ae021fa94adfc1487139e053f272172"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a3ae021fa94adfc1487139e053f272172">ripple::SHAMapItem::operator=</a></div><div class="ttdeci">SHAMapItem & operator=(SHAMapItem const &other)=delete</div></div>
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<div class="ttc" id="anamespaceripple_html_ad0655e5196cc0b5add7afefc2688d1e3"><div class="ttname"><a href="namespaceripple.html#ad0655e5196cc0b5add7afefc2688d1e3">ripple::intrusive_ptr_add_ref</a></div><div class="ttdeci">void intrusive_ptr_add_ref(SHAMapItem const *x)</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00131">SHAMapItem.h:131</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a167b4d4f68841afdb25e029faf254e9a"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a167b4d4f68841afdb25e029faf254e9a">ripple::SHAMapItem::make_shamapitem</a></div><div class="ttdeci">friend boost::intrusive_ptr< SHAMapItem > make_shamapitem(uint256 const &tag, Slice data)</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00160">SHAMapItem.h:160</a></div></div>
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<div class="ttc" id="anamespaceripple_1_1detail_html_ae9da365be7da5573d9c1c353af6eb470"><div class="ttname"><a href="namespaceripple_1_1detail.html#ae9da365be7da5573d9c1c353af6eb470">ripple::detail::slabber</a></div><div class="ttdeci">SlabAllocatorSet< SHAMapItem > slabber({ { 128, megabytes(std::size_t(60)) }, { 192, megabytes(std::size_t(46)) }, { 272, megabytes(std::size_t(60)) }, { 384, megabytes(std::size_t(56)) }, { 564, megabytes(std::size_t(40)) }, { 772, megabytes(std::size_t(46)) }, { 1052, megabytes(std::size_t(60)) }, })</div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a9d92059f2308f9fe008ad5cfbc7d9478"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a9d92059f2308f9fe008ad5cfbc7d9478">ripple::SHAMapItem::key</a></div><div class="ttdeci">uint256 const & key() const</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00087">SHAMapItem.h:87</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a18904203010378c5212d89e30ed66044"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a18904203010378c5212d89e30ed66044">ripple::SHAMapItem::size_</a></div><div class="ttdeci">const std::uint32_t size_</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00055">SHAMapItem.h:55</a></div></div>
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<div class="ttc" id="aclassripple_1_1base__uint_html"><div class="ttname"><a href="classripple_1_1base__uint.html">ripple::base_uint< 256 ></a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html"><div class="ttname"><a href="classripple_1_1SHAMapItem.html">ripple::SHAMapItem</a></div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00034">SHAMapItem.h:34</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a13d7c6c34d30731bbc221f629e03f8db"><div class="ttname"><a href="namespaceripple.html#a13d7c6c34d30731bbc221f629e03f8db">ripple::megabytes</a></div><div class="ttdeci">constexpr auto megabytes(T value) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="ByteUtilities_8h_source.html#l00034">ByteUtilities.h:34</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_ad322c63f7fbe6a84fa9e77715115f7a3"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#ad322c63f7fbe6a84fa9e77715115f7a3">ripple::SHAMapItem::size</a></div><div class="ttdeci">std::size_t size() const</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00093">SHAMapItem.h:93</a></div></div>
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<div class="ttc" id="ainteger_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/integer.html">std::uint32_t</a></div></div>
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<div class="ttc" id="aatomic_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/atomic/atomic.html">std::atomic< std::uint32_t ></a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a3f52867a7d3829faede60bf7dd5628ba"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a3f52867a7d3829faede60bf7dd5628ba">ripple::SHAMapItem::slice</a></div><div class="ttdeci">Slice slice() const</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00105">SHAMapItem.h:105</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a998cc5875809d78f5afbd599c4cf409f"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a998cc5875809d78f5afbd599c4cf409f">ripple::SHAMapItem::intrusive_ptr_release</a></div><div class="ttdeci">friend void intrusive_ptr_release(SHAMapItem const *x)</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00140">SHAMapItem.h:140</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_ad2831484014eca794c5c9e39258b39f2"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#ad2831484014eca794c5c9e39258b39f2">ripple::SHAMapItem::refcount_</a></div><div class="ttdeci">std::atomic< std::uint32_t > refcount_</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00058">SHAMapItem.h:58</a></div></div>
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<div class="ttc" id="anamespaceripple_html"><div class="ttname"><a href="namespaceripple.html">ripple</a></div><div class="ttdoc">Use hash_* containers for keys that do not need a cryptographically secure hashing algorithm.</div><div class="ttdef"><b>Definition:</b> <a href="RCLCensorshipDetector_8h_source.html#l00029">RCLCensorshipDetector.h:29</a></div></div>
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<div class="ttc" id="anamespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div><div class="ttdoc">STL namespace.</div></div>
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<div class="ttc" id="anamespaceripple_html_aefd2f77338ce3c9a2fffc4f0b289b483"><div class="ttname"><a href="namespaceripple.html#aefd2f77338ce3c9a2fffc4f0b289b483">ripple::LogicError</a></div><div class="ttdeci">void LogicError(std::string const &how) noexcept</div><div class="ttdoc">Called when faulty logic causes a broken invariant.</div><div class="ttdef"><b>Definition:</b> <a href="contract_8cpp_source.html#l00048">contract.cpp:48</a></div></div>
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<div class="ttc" id="acassert_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/cassert.html">cassert</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a42add542723b31666227194e46020f4b"><div class="ttname"><a href="namespaceripple.html#a42add542723b31666227194e46020f4b">ripple::intrusive_ptr_release</a></div><div class="ttdeci">void intrusive_ptr_release(SHAMapItem const *x)</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00140">SHAMapItem.h:140</a></div></div>
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<div class="ttc" id="asize_t_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a></div></div>
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<div class="ttc" id="amemcpy_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/byte/memcpy.html">std::memcpy</a></div><div class="ttdeci">T memcpy(T... args)</div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_abf90ca9bd7d9c5ce0a17e7f58cca2b91"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#abf90ca9bd7d9c5ce0a17e7f58cca2b91">ripple::SHAMapItem::tag_</a></div><div class="ttdeci">const uint256 tag_</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00050">SHAMapItem.h:50</a></div></div>
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<div class="ttc" id="aclassripple_1_1SHAMapItem_html_a90d7b0c93cfd51acdf151eba40fee683"><div class="ttname"><a href="classripple_1_1SHAMapItem.html#a90d7b0c93cfd51acdf151eba40fee683">ripple::SHAMapItem::SHAMapItem</a></div><div class="ttdeci">SHAMapItem(uint256 const &tag, Slice data)</div><div class="ttdef"><b>Definition:</b> <a href="SHAMapItem_8h_source.html#l00064">SHAMapItem.h:64</a></div></div>
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