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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_9f69212e4c6e2ca9ec5ab59cd7b6275c.html">app</a></li><li class="navelem"><a class="el" href="dir_796f40347441ba166e244d2eadcd4ae1.html">ledger</a></li> </ul>
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<div class="title">LedgerHolder.h</div> </div>
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<div class="contents">
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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_APP_LEDGER_LEDGERHOLDER_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_APP_LEDGER_LEDGERHOLDER_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/CountedObject.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/contract.h></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/mutex.html">mutex</a>></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  </div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span><a class="code" href="namespaceripple.html">ripple</a> {</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">// Can std::atomic<std::shared_ptr>> make this lock free?</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="comment">// VFALCO NOTE This class can be replaced with atomic<shared_ptr<...>></span></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="l00039"></a><span class="lineno"><a class="line" href="classripple_1_1LedgerHolder.html"> 39</a></span> <span class="keyword">class </span><a class="code" href="classripple_1_1LedgerHolder.html">LedgerHolder</a> : <span class="keyword">public</span> <a class="code" href="classripple_1_1CountedObject.html">CountedObject</a><LedgerHolder></div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> {</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// Update the held ledger</span></div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">void</span></div>
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<div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="classripple_1_1LedgerHolder.html#aa824811e930ab1ebf8e6449355c541b1"> 44</a></span>  <a class="code" href="classripple_1_1LedgerHolder.html#aa824811e930ab1ebf8e6449355c541b1">set</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr<Ledger const></a> ledger)</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">if</span> (!ledger)</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <a class="code" href="namespaceripple.html#aefd2f77338ce3c9a2fffc4f0b289b483">LogicError</a>(<span class="stringliteral">"LedgerHolder::set with nullptr"</span>);</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (!ledger->isImmutable())</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="namespaceripple.html#aefd2f77338ce3c9a2fffc4f0b289b483">LogicError</a>(<span class="stringliteral">"LedgerHolder::set with mutable Ledger"</span>);</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/lock_guard.html">std::lock_guard</a> sl(<a class="code" href="classripple_1_1LedgerHolder.html#a8ecb79804c3e902dd324cbb1cd6b0a7b">m_lock</a>);</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="classripple_1_1LedgerHolder.html#ad1b0d556cfdf69766990a195a745ae50">m_heldLedger</a> = std::move(ledger);</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  }</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// Return the (immutable) held ledger</span></div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr<Ledger const></a></div>
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<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="classripple_1_1LedgerHolder.html#a213656e1e54f1aff2e3a3464be7ec257"> 56</a></span>  <a class="code" href="classripple_1_1LedgerHolder.html#a213656e1e54f1aff2e3a3464be7ec257">get</a>()</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  {</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/lock_guard.html">std::lock_guard</a> sl(<a class="code" href="classripple_1_1LedgerHolder.html#a8ecb79804c3e902dd324cbb1cd6b0a7b">m_lock</a>);</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1LedgerHolder.html#ad1b0d556cfdf69766990a195a745ae50">m_heldLedger</a>;</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  }</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordtype">bool</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="classripple_1_1LedgerHolder.html#a87cfd83ef66929c86ce7a0cf6050c02c"> 63</a></span>  <a class="code" href="classripple_1_1LedgerHolder.html#a87cfd83ef66929c86ce7a0cf6050c02c">empty</a>()</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/lock_guard.html">std::lock_guard</a> sl(<a class="code" href="classripple_1_1LedgerHolder.html#a8ecb79804c3e902dd324cbb1cd6b0a7b">m_lock</a>);</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">return</span> <a class="code" href="classripple_1_1LedgerHolder.html#ad1b0d556cfdf69766990a195a745ae50">m_heldLedger</a> == <span class="keyword">nullptr</span>;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  }</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="classripple_1_1LedgerHolder.html#a8ecb79804c3e902dd324cbb1cd6b0a7b"> 70</a></span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/mutex.html">std::mutex</a> <a class="code" href="classripple_1_1LedgerHolder.html#a8ecb79804c3e902dd324cbb1cd6b0a7b">m_lock</a>;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="classripple_1_1LedgerHolder.html#ad1b0d556cfdf69766990a195a745ae50"> 71</a></span>  <a class="codeRef" href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr<Ledger const></a> <a class="code" href="classripple_1_1LedgerHolder.html#ad1b0d556cfdf69766990a195a745ae50">m_heldLedger</a>;</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>  </div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> } <span class="comment">// namespace ripple</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> <span class="preprocessor">#endif</span></div>
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</div><!-- fragment --></div><!-- contents -->
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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="ashared_ptr_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/memory/shared_ptr.html">std::shared_ptr</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="aclassripple_1_1LedgerHolder_html_aa824811e930ab1ebf8e6449355c541b1"><div class="ttname"><a href="classripple_1_1LedgerHolder.html#aa824811e930ab1ebf8e6449355c541b1">ripple::LedgerHolder::set</a></div><div class="ttdeci">void set(std::shared_ptr< Ledger const > ledger)</div><div class="ttdef"><b>Definition:</b> <a href="LedgerHolder_8h_source.html#l00044">LedgerHolder.h:44</a></div></div>
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<div class="ttc" id="alock_guard_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/thread/lock_guard.html">std::lock_guard</a></div><div class="ttdoc">STL class.</div></div>
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<div class="ttc" id="aclassripple_1_1LedgerHolder_html_a8ecb79804c3e902dd324cbb1cd6b0a7b"><div class="ttname"><a href="classripple_1_1LedgerHolder.html#a8ecb79804c3e902dd324cbb1cd6b0a7b">ripple::LedgerHolder::m_lock</a></div><div class="ttdeci">std::mutex m_lock</div><div class="ttdef"><b>Definition:</b> <a href="LedgerHolder_8h_source.html#l00070">LedgerHolder.h:70</a></div></div>
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<div class="ttc" id="aclassripple_1_1LedgerHolder_html_a87cfd83ef66929c86ce7a0cf6050c02c"><div class="ttname"><a href="classripple_1_1LedgerHolder.html#a87cfd83ef66929c86ce7a0cf6050c02c">ripple::LedgerHolder::empty</a></div><div class="ttdeci">bool empty()</div><div class="ttdef"><b>Definition:</b> <a href="LedgerHolder_8h_source.html#l00063">LedgerHolder.h:63</a></div></div>
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<div class="ttc" id="aclassripple_1_1LedgerHolder_html_a213656e1e54f1aff2e3a3464be7ec257"><div class="ttname"><a href="classripple_1_1LedgerHolder.html#a213656e1e54f1aff2e3a3464be7ec257">ripple::LedgerHolder::get</a></div><div class="ttdeci">std::shared_ptr< Ledger const > get()</div><div class="ttdef"><b>Definition:</b> <a href="LedgerHolder_8h_source.html#l00056">LedgerHolder.h:56</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="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="aclassripple_1_1LedgerHolder_html"><div class="ttname"><a href="classripple_1_1LedgerHolder.html">ripple::LedgerHolder</a></div><div class="ttdoc">Hold a ledger in a thread-safe way.</div><div class="ttdef"><b>Definition:</b> <a href="LedgerHolder_8h_source.html#l00039">LedgerHolder.h:39</a></div></div>
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<div class="ttc" id="amutex_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/mutex.html">mutex</a></div></div>
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<div class="ttc" id="aclassripple_1_1LedgerHolder_html_ad1b0d556cfdf69766990a195a745ae50"><div class="ttname"><a href="classripple_1_1LedgerHolder.html#ad1b0d556cfdf69766990a195a745ae50">ripple::LedgerHolder::m_heldLedger</a></div><div class="ttdeci">std::shared_ptr< Ledger const > m_heldLedger</div><div class="ttdef"><b>Definition:</b> <a href="LedgerHolder_8h_source.html#l00071">LedgerHolder.h:71</a></div></div>
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