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 <span id="projectnumber">2.3.0</span>
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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_66e9674e8206a335795995fa32a03c91.html">entt</a></li><li class="navelem"><a class="el" href="dir_85dbee8884f1b3a817fa7eff8dff73ec.html">resource</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef ENTT_RESOURCE_CACHE_HPP</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define ENTT_RESOURCE_CACHE_HPP</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <utility></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <type_traits></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <unordered_map></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include "../core/hashed_string.hpp"</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "handle.hpp"</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "loader.hpp"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">namespace </span><a class="code" href="namespaceentt.html">entt</a> {</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">template</span><<span class="keyword">typename</span> Resource></div><div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html"> 28</a></span> <span class="keyword">class </span><a class="code" href="classentt_1_1ResourceCache.html">ResourceCache</a> {</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">using</span> container_type = std::unordered_map<HashedString::hash_type, std::shared_ptr<Resource>>;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#a439daf6009e24ae40b1d7689c60ead48"> 33</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1ResourceCache.html#a439daf6009e24ae40b1d7689c60ead48">size_type</a> = <span class="keyword">typename</span> container_type::size_type;</div><div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#a4936da93a62827d8c5fc04ac444e5456"> 35</a></span>  <span class="keyword">using</span> <a class="code" href="classentt_1_1HashedString.html">resource_type</a> = <a class="code" href="classentt_1_1HashedString.html">HashedString</a>;</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <a class="code" href="classentt_1_1ResourceCache.html#aaeb4613b842a5d0861585e024af0a41d">ResourceCache</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <a class="code" href="classentt_1_1ResourceCache.html#aaeb4613b842a5d0861585e024af0a41d">ResourceCache</a>(<span class="keyword">const</span> <a class="code" href="classentt_1_1ResourceCache.html">ResourceCache</a> &) noexcept = <span class="keyword">delete</span>;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <a class="code" href="classentt_1_1ResourceCache.html#aaeb4613b842a5d0861585e024af0a41d">ResourceCache</a>(<a class="code" href="classentt_1_1ResourceCache.html">ResourceCache</a> &&) noexcept = default;</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <a class="code" href="classentt_1_1ResourceCache.html">ResourceCache</a> & operator=(const <a class="code" href="classentt_1_1ResourceCache.html">ResourceCache</a> &) noexcept = delete;</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="classentt_1_1ResourceCache.html">ResourceCache</a> & operator=(<a class="code" href="classentt_1_1ResourceCache.html">ResourceCache</a> &&) noexcept = default;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#aa6a37cbcdd34fe3a6bc4a0d7672d3272"> 54</a></span>  <a class="code" href="classentt_1_1ResourceCache.html#a439daf6009e24ae40b1d7689c60ead48">size_type</a> <a class="code" href="classentt_1_1ResourceCache.html#aa6a37cbcdd34fe3a6bc4a0d7672d3272">size</a>() const noexcept {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> resources.size();</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#a6057263acf3e515be3d4cf50218265c4"> 62</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1ResourceCache.html#a6057263acf3e515be3d4cf50218265c4">empty</a>() const noexcept {</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> resources.empty();</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00072"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#a2d179ddd5034e89bd60d69c7f8cf00d7"> 72</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1ResourceCache.html#a2d179ddd5034e89bd60d69c7f8cf00d7">clear</a>() noexcept {</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  resources.clear();</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Loader, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#aefa3bb9cd798772c1c35fe6292d05480"> 95</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1ResourceCache.html#aefa3bb9cd798772c1c35fe6292d05480">load</a>(<a class="code" href="classentt_1_1HashedString.html">resource_type</a> <span class="keywordtype">id</span>, Args&&... args) {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  static_assert(std::is_base_of<<a class="code" href="classentt_1_1ResourceLoader.html">ResourceLoader<Loader, Resource></a>, Loader>::value, <span class="stringliteral">"!"</span>);</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">bool</span> loaded = <span class="keyword">true</span>;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span>(resources.find(<span class="keywordtype">id</span>) == resources.cend()) {</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  std::shared_ptr<Resource> resource = Loader{}.get(std::forward<Args>(args)...);</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  loaded = (<span class="keyword">static_cast<</span><span class="keywordtype">bool</span><span class="keyword">></span>(resource) ? (resources[<span class="keywordtype">id</span>] = std::move(resource), loaded) : <span class="keyword">false</span>);</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  }</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span> loaded;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">template</span><<span class="keyword">typename</span> Loader, <span class="keyword">typename</span>... Args></div><div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#a902ebb2e8fb2dc45115467d8e5b1e2b9"> 128</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1ResourceCache.html#a902ebb2e8fb2dc45115467d8e5b1e2b9">reload</a>(<a class="code" href="classentt_1_1HashedString.html">resource_type</a> <span class="keywordtype">id</span>, Args&&... args) {</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">return</span> (<a class="code" href="classentt_1_1ResourceCache.html#ae4580245a9a3bf2d4ef76ceab8abad2a">discard</a>(<span class="keywordtype">id</span>), <a class="code" href="classentt_1_1ResourceCache.html#aefa3bb9cd798772c1c35fe6292d05480">load</a>(<span class="keywordtype">id</span>, std::forward<Args>(args)...));</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  }</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div><div class="line"><a name="l00145"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#a8d4d161416429f765a2372c4053d7e88"> 145</a></span>  <a class="code" href="classentt_1_1ResourceHandle.html">ResourceHandle<Resource></a> <a class="code" href="classentt_1_1ResourceCache.html#a8d4d161416429f765a2372c4053d7e88">handle</a>(<a class="code" href="classentt_1_1HashedString.html">resource_type</a> <span class="keywordtype">id</span>)<span class="keyword"> const </span>{</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keyword">auto</span> it = resources.find(<span class="keywordtype">id</span>);</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">return</span> { it == resources.end() ? nullptr : it->second };</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div><div class="line"><a name="l00155"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#abc98a061dd5b9924101ed252bdb3f05b"> 155</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classentt_1_1ResourceCache.html#abc98a061dd5b9924101ed252bdb3f05b">contains</a>(<a class="code" href="classentt_1_1HashedString.html">resource_type</a> <span class="keywordtype">id</span>) <span class="keyword">const</span> noexcept {</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordflow">return</span> !(resources.find(<span class="keywordtype">id</span>) == resources.cend());</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00167"></a><span class="lineno"><a class="line" href="classentt_1_1ResourceCache.html#ae4580245a9a3bf2d4ef76ceab8abad2a"> 167</a></span>  <span class="keywordtype">void</span> <a class="code" href="classentt_1_1ResourceCache.html#ae4580245a9a3bf2d4ef76ceab8abad2a">discard</a>(<a class="code" href="classentt_1_1HashedString.html">resource_type</a> <span class="keywordtype">id</span>) noexcept {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keyword">auto</span> it = resources.find(<span class="keywordtype">id</span>);</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">if</span>(it != resources.end()) {</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  resources.erase(it);</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  }</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  }</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> </div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  container_type resources;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> };</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> </div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> }</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="preprocessor">#endif // ENTT_RESOURCE_CACHE_HPP</span></div><div class="ttc" id="classentt_1_1ResourceCache_html_a439daf6009e24ae40b1d7689c60ead48"><div class="ttname"><a href="classentt_1_1ResourceCache.html#a439daf6009e24ae40b1d7689c60ead48">entt::ResourceCache::size_type</a></div><div class="ttdeci">typename container_type::size_type size_type</div><div class="ttdoc">Unsigned integer type. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00033">cache.hpp:33</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_abc98a061dd5b9924101ed252bdb3f05b"><div class="ttname"><a href="classentt_1_1ResourceCache.html#abc98a061dd5b9924101ed252bdb3f05b">entt::ResourceCache::contains</a></div><div class="ttdeci">bool contains(resource_type id) const noexcept</div><div class="ttdoc">Checks if a cache contains the given identifier. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00155">cache.hpp:155</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_aefa3bb9cd798772c1c35fe6292d05480"><div class="ttname"><a href="classentt_1_1ResourceCache.html#aefa3bb9cd798772c1c35fe6292d05480">entt::ResourceCache::load</a></div><div class="ttdeci">bool load(resource_type id, Args &&... args)</div><div class="ttdoc">Loads the resource that corresponds to the given identifier. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00095">cache.hpp:95</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_a6057263acf3e515be3d4cf50218265c4"><div class="ttname"><a href="classentt_1_1ResourceCache.html#a6057263acf3e515be3d4cf50218265c4">entt::ResourceCache::empty</a></div><div class="ttdeci">bool empty() const noexcept</div><div class="ttdoc">Returns true if a cache contains no resources, false otherwise. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00062">cache.hpp:62</a></div></div>
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<div class="ttc" id="namespaceentt_html"><div class="ttname"><a href="namespaceentt.html">entt</a></div><div class="ttdoc">EnTT default namespace. </div><div class="ttdef"><b>Definition:</b> <a href="family_8hpp_source.html#l00009">family.hpp:9</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_ae4580245a9a3bf2d4ef76ceab8abad2a"><div class="ttname"><a href="classentt_1_1ResourceCache.html#ae4580245a9a3bf2d4ef76ceab8abad2a">entt::ResourceCache::discard</a></div><div class="ttdeci">void discard(resource_type id) noexcept</div><div class="ttdoc">Discards the resource that corresponds to the given identifier. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00167">cache.hpp:167</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_aaeb4613b842a5d0861585e024af0a41d"><div class="ttname"><a href="classentt_1_1ResourceCache.html#aaeb4613b842a5d0861585e024af0a41d">entt::ResourceCache::ResourceCache</a></div><div class="ttdeci">ResourceCache()=default</div><div class="ttdoc">Default constructor. </div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_a8d4d161416429f765a2372c4053d7e88"><div class="ttname"><a href="classentt_1_1ResourceCache.html#a8d4d161416429f765a2372c4053d7e88">entt::ResourceCache::handle</a></div><div class="ttdeci">ResourceHandle< Resource > handle(resource_type id) const</div><div class="ttdoc">Creates a handle for the given resource identifier. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00145">cache.hpp:145</a></div></div>
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<div class="ttc" id="classentt_1_1HashedString_html"><div class="ttname"><a href="classentt_1_1HashedString.html">entt::HashedString</a></div><div class="ttdoc">Zero overhead resource identifier. </div><div class="ttdef"><b>Definition:</b> <a href="hashed__string_8hpp_source.html#l00020">hashed_string.hpp:20</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_a902ebb2e8fb2dc45115467d8e5b1e2b9"><div class="ttname"><a href="classentt_1_1ResourceCache.html#a902ebb2e8fb2dc45115467d8e5b1e2b9">entt::ResourceCache::reload</a></div><div class="ttdeci">void reload(resource_type id, Args &&... args)</div><div class="ttdoc">Reloads a resource or loads it for the first time if not present. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00128">cache.hpp:128</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceLoader_html"><div class="ttname"><a href="classentt_1_1ResourceLoader.html">entt::ResourceLoader</a></div><div class="ttdoc">Base class for resource loaders. </div><div class="ttdef"><b>Definition:</b> <a href="loader_8hpp_source.html#l00048">loader.hpp:48</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_aa6a37cbcdd34fe3a6bc4a0d7672d3272"><div class="ttname"><a href="classentt_1_1ResourceCache.html#aa6a37cbcdd34fe3a6bc4a0d7672d3272">entt::ResourceCache::size</a></div><div class="ttdeci">size_type size() const noexcept</div><div class="ttdoc">Number of resources managed by a cache. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00054">cache.hpp:54</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceHandle_html"><div class="ttname"><a href="classentt_1_1ResourceHandle.html">entt::ResourceHandle</a></div><div class="ttdoc">Shared resource handle. </div><div class="ttdef"><b>Definition:</b> <a href="handle_8hpp_source.html#l00030">handle.hpp:30</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html_a2d179ddd5034e89bd60d69c7f8cf00d7"><div class="ttname"><a href="classentt_1_1ResourceCache.html#a2d179ddd5034e89bd60d69c7f8cf00d7">entt::ResourceCache::clear</a></div><div class="ttdeci">void clear() noexcept</div><div class="ttdoc">Clears a cache and discards all its resources. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00072">cache.hpp:72</a></div></div>
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<div class="ttc" id="classentt_1_1ResourceCache_html"><div class="ttname"><a href="classentt_1_1ResourceCache.html">entt::ResourceCache</a></div><div class="ttdoc">Simple cache for resources of a given type. </div><div class="ttdef"><b>Definition:</b> <a href="cache_8hpp_source.html#l00028">cache.hpp:28</a></div></div>
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