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<div id="projectname">libaaruformat<span id="projectnumber"> 1.0</span>
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<div id="projectbrief">Aaru Data Preservation Suite - Format Library</div>
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<div class="headertitle"><div class="title">lru.c</div></div>
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<a href="lru_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#include <stddef.h></span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="preprocessor">#include <stdint.h></span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="preprocessor">#include <stdlib.h></span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include <uthash.h></span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> </div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include <<a class="code" href="aaruformat_8h.html">aaruformat.h</a>></span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// LRU cache using uthash with native integer keys.</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">// Based on uthash LRU example by Jehiah Czebotar 2011 (public domain).</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment">// Rewritten to use HASH_FIND/HASH_ADD with uint64_t keys directly,</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment">// eliminating all string conversion, malloc, and snprintf overhead</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">// from the hot path.</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span></div>
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<div class="foldopen" id="foldopen00020" data-start="{" data-end="}">
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"><a class="line" href="lru_8c.html#a112d9186077b4421f4fa0f9c6c76425e"> 20</a></span><span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code hl_function" href="lru_8c.html#a112d9186077b4421f4fa0f9c6c76425e">drop_entry</a>(<span class="keyword">struct</span> <a class="code hl_struct" href="structCacheHeader.html">CacheHeader</a> *cache, <span class="keyword">struct</span> <a class="code hl_struct" href="structCacheEntry.html">CacheEntry</a> *entry)</div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span>{</div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> HASH_DELETE(hh, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, entry);</div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> cache-><a class="code hl_variable" href="structCacheHeader.html#ae6521ccf8e75b0c9c70297af637b1eaa">cur_bytes</a> -= entry-><a class="code hl_variable" href="structCacheEntry.html#ab7bea8f5ce4dc7ace006ccabd45a0d1f">size</a>;</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keywordflow">if</span>(cache-><a class="code hl_variable" href="structCacheHeader.html#a54d553e78f5d90cce34ee684829a410f">free_func</a> && entry-><a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a>) cache-><a class="code hl_variable" href="structCacheHeader.html#a54d553e78f5d90cce34ee684829a410f">free_func</a>(entry-><a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a>);</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> free(entry);</div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>}</div>
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</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span></div>
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<div class="foldopen" id="foldopen00041" data-start="{" data-end="}">
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"><a class="line" href="lru_8h.html#a8cb7ac8e057627210732ee61d2966e35"> 41</a></span><span class="keywordtype">void</span> *<a class="code hl_function" href="lru_8h.html#a8cb7ac8e057627210732ee61d2966e35">find_in_cache_uint64</a>(<span class="keyword">struct</span> <a class="code hl_struct" href="structCacheHeader.html">CacheHeader</a> *cache, <span class="keyword">const</span> uint64_t key)</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span>{</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">struct </span><a class="code hl_struct" href="structCacheEntry.html">CacheEntry</a> *entry = NULL;</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> HASH_FIND(<a class="code hl_variable" href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">hh</a>, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, &<a class="code hl_variable" href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">key</a>, <span class="keyword">sizeof</span>(uint64_t), entry);</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">if</span>(entry)</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> {</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Remove and re-add to move to front of insertion-order list (LRU refresh).</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> HASH_DELETE(<a class="code hl_variable" href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">hh</a>, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, entry);</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> HASH_ADD(<a class="code hl_variable" href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">hh</a>, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, <a class="code hl_variable" href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">key</a>, <span class="keyword">sizeof</span>(uint64_t), entry);</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">return</span> entry-><a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a>;</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> }</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">return</span> NULL;</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span>}</div>
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</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span></div>
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<div class="foldopen" id="foldopen00068" data-start="{" data-end="}">
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"><a class="line" href="lru_8h.html#a4c0693df23b76b54750218753a748223"> 68</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="lru_8h.html#a4c0693df23b76b54750218753a748223">add_to_cache_uint64</a>(<span class="keyword">struct</span> <a class="code hl_struct" href="structCacheHeader.html">CacheHeader</a> *cache, <span class="keyword">const</span> uint64_t <a class="code hl_variable" href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">key</a>, <span class="keywordtype">void</span> *<a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a>, <span class="keyword">const</span> <span class="keywordtype">size_t</span> <a class="code hl_variable" href="structCacheEntry.html#ab7bea8f5ce4dc7ace006ccabd45a0d1f">size</a>)</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span>{</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">struct </span><a class="code hl_struct" href="structCacheEntry.html">CacheEntry</a> *entry = NULL;</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> </div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="comment">// Replace an existing entry for this key. A blind HASH_ADD would leave the old entry in the</span></div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// table unreachable by HASH_FIND, and its value alive until the whole cache is freed.</span></div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> HASH_FIND(<a class="code hl_variable" href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">hh</a>, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, &<a class="code hl_variable" href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">key</a>, <span class="keyword">sizeof</span>(uint64_t), entry);</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> </div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordflow">if</span>(entry)</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> {</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> cache-><a class="code hl_variable" href="structCacheHeader.html#ae6521ccf8e75b0c9c70297af637b1eaa">cur_bytes</a> -= entry-><a class="code hl_variable" href="structCacheEntry.html#ab7bea8f5ce4dc7ace006ccabd45a0d1f">size</a>;</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keywordflow">if</span>(cache-><a class="code hl_variable" href="structCacheHeader.html#a54d553e78f5d90cce34ee684829a410f">free_func</a> && entry-><a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a> && entry-><a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a> != <a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a>) cache-><a class="code hl_variable" href="structCacheHeader.html#a54d553e78f5d90cce34ee684829a410f">free_func</a>(entry-><a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a>);</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> HASH_DELETE(<a class="code hl_variable" href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">hh</a>, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, entry);</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> }</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> {</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> entry = malloc(<span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code hl_struct" href="structCacheEntry.html">CacheEntry</a>));</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">if</span>(!entry) <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> }</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> entry-><a class="code hl_variable" href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">key</a> = <a class="code hl_variable" href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">key</a>;</div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> entry-><a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a> = <a class="code hl_variable" href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">value</a>;</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> entry-><a class="code hl_variable" href="structCacheEntry.html#ab7bea8f5ce4dc7ace006ccabd45a0d1f">size</a> = <a class="code hl_variable" href="structCacheEntry.html#ab7bea8f5ce4dc7ace006ccabd45a0d1f">size</a>;</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> HASH_ADD(<a class="code hl_variable" href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">hh</a>, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, <a class="code hl_variable" href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">key</a>, <span class="keyword">sizeof</span>(uint64_t), entry);</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> cache-><a class="code hl_variable" href="structCacheHeader.html#ae6521ccf8e75b0c9c70297af637b1eaa">cur_bytes</a> += <a class="code hl_variable" href="structCacheEntry.html#ab7bea8f5ce4dc7ace006ccabd45a0d1f">size</a>;</div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> </div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">if</span>(cache-><a class="code hl_variable" href="structCacheHeader.html#af82718ebf5e59a398bc6e9428a389bb2">max_bytes</a> == 0) <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> </div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// Evict least recently used entries until back under budget. Never evict the entry just</span></div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="comment">// inserted: the caller still uses that pointer after this returns.</span></div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="keywordflow">while</span>(cache-><a class="code hl_variable" href="structCacheHeader.html#ae6521ccf8e75b0c9c70297af637b1eaa">cur_bytes</a> > cache-><a class="code hl_variable" href="structCacheHeader.html#af82718ebf5e59a398bc6e9428a389bb2">max_bytes</a> && HASH_COUNT(cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>) > 1)</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> {</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">struct </span><a class="code hl_struct" href="structCacheEntry.html">CacheEntry</a> *oldest = cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>;</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> </div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="keywordflow">if</span>(oldest == NULL || oldest == entry) <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> </div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <a class="code hl_function" href="lru_8c.html#a112d9186077b4421f4fa0f9c6c76425e">drop_entry</a>(cache, oldest);</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> }</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span>}</div>
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</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span></div>
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<div class="foldopen" id="foldopen00118" data-start="{" data-end="}">
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"><a class="line" href="lru_8h.html#a92e298695411672c3497ae5c8d9c0427"> 118</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="lru_8h.html#a92e298695411672c3497ae5c8d9c0427">free_cache</a>(<span class="keyword">struct</span> <a class="code hl_struct" href="structCacheHeader.html">CacheHeader</a> *cache)</div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span>{</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keyword">struct </span><a class="code hl_struct" href="structCacheEntry.html">CacheEntry</a> *entry, *tmp;</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> </div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keywordflow">if</span>(!cache || !cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>) <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> </div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> HASH_ITER(<a class="code hl_variable" href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">hh</a>, cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a>, entry, tmp) { <a class="code hl_function" href="lru_8c.html#a112d9186077b4421f4fa0f9c6c76425e">drop_entry</a>(cache, entry); }</div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> </div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> cache-><a class="code hl_variable" href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">cache</a> = NULL;</div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> cache-><a class="code hl_variable" href="structCacheHeader.html#ae6521ccf8e75b0c9c70297af637b1eaa">cur_bytes</a> = 0;</div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span>}</div>
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</div>
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<div class="ttc" id="aaaruformat_8h_html"><div class="ttname"><a href="aaruformat_8h.html">aaruformat.h</a></div></div>
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<div class="ttc" id="alru_8c_html_a112d9186077b4421f4fa0f9c6c76425e"><div class="ttname"><a href="lru_8c.html#a112d9186077b4421f4fa0f9c6c76425e">drop_entry</a></div><div class="ttdeci">static void drop_entry(struct CacheHeader *cache, struct CacheEntry *entry)</div><div class="ttdoc">Frees a cache entry's value and unlinks it from the cache.</div><div class="ttdef"><b>Definition</b> <a href="#l00020">lru.c:20</a></div></div>
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<div class="ttc" id="alru_8h_html_a4c0693df23b76b54750218753a748223"><div class="ttname"><a href="lru_8h.html#a4c0693df23b76b54750218753a748223">add_to_cache_uint64</a></div><div class="ttdeci">void add_to_cache_uint64(struct CacheHeader *cache, uint64_t key, void *value, size_t size)</div><div class="ttdoc">Adds a value to the cache with a uint64_t key, evicting LRU entries if over budget.</div><div class="ttdef"><b>Definition</b> <a href="#l00068">lru.c:68</a></div></div>
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<div class="ttc" id="alru_8h_html_a8cb7ac8e057627210732ee61d2966e35"><div class="ttname"><a href="lru_8h.html#a8cb7ac8e057627210732ee61d2966e35">find_in_cache_uint64</a></div><div class="ttdeci">void * find_in_cache_uint64(struct CacheHeader *cache, uint64_t key)</div><div class="ttdoc">Finds a value in the cache by uint64_t key.</div><div class="ttdef"><b>Definition</b> <a href="#l00041">lru.c:41</a></div></div>
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<div class="ttc" id="alru_8h_html_a92e298695411672c3497ae5c8d9c0427"><div class="ttname"><a href="lru_8h.html#a92e298695411672c3497ae5c8d9c0427">free_cache</a></div><div class="ttdeci">void free_cache(struct CacheHeader *cache)</div><div class="ttdoc">Frees all entries in the cache and clears it.</div><div class="ttdef"><b>Definition</b> <a href="#l00118">lru.c:118</a></div></div>
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<div class="ttc" id="astructCacheEntry_html"><div class="ttname"><a href="structCacheEntry.html">CacheEntry</a></div><div class="ttdoc">Single hash entry in the in-memory cache.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00024">lru.h:25</a></div></div>
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<div class="ttc" id="astructCacheEntry_html_a7d6d1ed0aab03cffbb34aff16f6f3d56"><div class="ttname"><a href="structCacheEntry.html#a7d6d1ed0aab03cffbb34aff16f6f3d56">CacheEntry::value</a></div><div class="ttdeci">void * value</div><div class="ttdoc">Opaque value pointer associated with key.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00027">lru.h:27</a></div></div>
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<div class="ttc" id="astructCacheEntry_html_ab7bea8f5ce4dc7ace006ccabd45a0d1f"><div class="ttname"><a href="structCacheEntry.html#ab7bea8f5ce4dc7ace006ccabd45a0d1f">CacheEntry::size</a></div><div class="ttdeci">size_t size</div><div class="ttdoc">Size in bytes of the memory pointed to by value.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00028">lru.h:28</a></div></div>
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<div class="ttc" id="astructCacheEntry_html_acee4cc303db10f54cfe2314142f24428"><div class="ttname"><a href="structCacheEntry.html#acee4cc303db10f54cfe2314142f24428">CacheEntry::key</a></div><div class="ttdeci">uint64_t key</div><div class="ttdoc">64-bit integer key (unique within the cache).</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00026">lru.h:26</a></div></div>
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<div class="ttc" id="astructCacheEntry_html_ae7e5f03fa52b88d99e27e2433623b4f5"><div class="ttname"><a href="structCacheEntry.html#ae7e5f03fa52b88d99e27e2433623b4f5">CacheEntry::hh</a></div><div class="ttdeci">UT_hash_handle hh</div><div class="ttdoc">uthash handle (must remain per uthash docs).</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00029">lru.h:29</a></div></div>
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<div class="ttc" id="astructCacheHeader_html"><div class="ttname"><a href="structCacheHeader.html">CacheHeader</a></div><div class="ttdoc">Cache top-level descriptor encapsulating the hash table root and capacity limit.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00050">lru.h:51</a></div></div>
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<div class="ttc" id="astructCacheHeader_html_a44229bb929d8949f3c2700d07123d224"><div class="ttname"><a href="structCacheHeader.html#a44229bb929d8949f3c2700d07123d224">CacheHeader::cache</a></div><div class="ttdeci">struct CacheEntry * cache</div><div class="ttdoc">Hash root (uthash). NULL when empty.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00054">lru.h:54</a></div></div>
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<div class="ttc" id="astructCacheHeader_html_a54d553e78f5d90cce34ee684829a410f"><div class="ttname"><a href="structCacheHeader.html#a54d553e78f5d90cce34ee684829a410f">CacheHeader::free_func</a></div><div class="ttdeci">void(*) free_func(void *)</div><div class="ttdoc">Optional callback to free cached values. NULL if not needed.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00055">lru.h:55</a></div></div>
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<div class="ttc" id="astructCacheHeader_html_ae6521ccf8e75b0c9c70297af637b1eaa"><div class="ttname"><a href="structCacheHeader.html#ae6521ccf8e75b0c9c70297af637b1eaa">CacheHeader::cur_bytes</a></div><div class="ttdeci">uint64_t cur_bytes</div><div class="ttdoc">Bytes currently held by the cached values.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00053">lru.h:53</a></div></div>
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<div class="ttc" id="astructCacheHeader_html_af82718ebf5e59a398bc6e9428a389bb2"><div class="ttname"><a href="structCacheHeader.html#af82718ebf5e59a398bc6e9428a389bb2">CacheHeader::max_bytes</a></div><div class="ttdeci">uint64_t max_bytes</div><div class="ttdoc">Memory budget in bytes for the cached values. 0 means unlimited.</div><div class="ttdef"><b>Definition</b> <a href="lru_8h_source.html#l00052">lru.h:52</a></div></div>
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