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<div id="projectname">NimbusKit
 <span id="projectnumber">1.2.1 - <a href="http://github.com/jverkoey/nimbus">Fork Nimbus on Github</a> - <a href="http://wiki.nimbuskit.info/">Visit the Nimbus Wiki</a></span>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright 2011-2014 NimbusKit</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">//</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// limitations under the License.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">//</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#import "NIInMemoryCache.h"</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#import "NIDebuggingTools.h"</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#import "NIPreprocessorMacros.h"</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#import <UIKit/UIKit.h></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> </div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#if !defined(__has_feature) || !__has_feature(objc_arc)</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor"></span><span class="preprocessor">#error "Nimbus requires ARC support."</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">@interface </span><a class="code" href="NIMemoryCache.html">NIMemoryCache</a>()</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">// Mapping from a name (usually a URL) to an internal object.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">@property</span> (nonatomic, strong) NSMutableDictionary* cacheMap;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// A linked list of least recently used cache objects. Most recently used is the tail.</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">@property</span> (nonatomic, strong) NSMutableOrderedSet* lruCacheObjects;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">@end</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">@interface </span>NIMemoryCacheInfo : NSObject</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">@property</span> (nonatomic, copy) NSString* name;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">@property</span> (nonatomic, strong) <span class="keywordtype">id</span> <span class="keywordtype">object</span>;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">@property</span> (nonatomic, strong) NSDate* expirationDate;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="keyword">@property</span> (nonatomic, strong) NSDate* lastAccessTime;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> - (BOOL)hasExpired;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">@end</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">@implementation </span><a class="code" href="NIMemoryCache.html">NIMemoryCache</a></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> - (void)dealloc {</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  [[NSNotificationCenter defaultCenter] removeObserver:self];</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> }</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> - (id)init {</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">return</span> [<span class="keyword">self</span> initWithCapacity:0];</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> }</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
<div class="line"><a name="l00088"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#initWithCapacity:"> 88</a></span> - (id)initWithCapacity:(NSUInteger)capacity {</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> ((<span class="keyword">self</span> = [super init])) {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  _cacheMap = [[NSMutableDictionary alloc] initWithCapacity:capacity];</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  _lruCacheObjects = [NSMutableOrderedSet orderedSet];</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// Automatically reduce memory usage when we get a memory warning.</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  [[NSNotificationCenter defaultCenter] addObserver:self</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  selector:@selector(reduceMemoryUsage)</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  name:UIApplicationDidReceiveMemoryWarningNotification</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  object:nil];</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> <span class="keyword">self</span>;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> - (NSString *)description {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">return</span> [NSString stringWithFormat:</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>  @" lruObjects: %@"</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  @" cache map: %@"</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  @">",</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  [<span class="keyword">super</span> description],</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  self.lruCacheObjects,</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  self.cacheMap];</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> }</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="preprocessor">#pragma mark - Internal</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> - (void)updateAccessTimeForInfo:(NIMemoryCacheInfo *)info {</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  NIDASSERT(nil != info);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">if</span> (nil == info) {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span>; <span class="comment">// COV_NF_LINE</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  info.lastAccessTime = [NSDate date];</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  [<span class="keyword">self</span>.lruCacheObjects removeObject:info];</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  [<span class="keyword">self</span>.lruCacheObjects addObject:info];</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> }</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> - (NIMemoryCacheInfo *)cacheInfoForName:(NSString *)name {</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  NIMemoryCacheInfo* info;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  info = <span class="keyword">self</span>.cacheMap[name];</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> info;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> - (void)setCacheInfo:(NIMemoryCacheInfo *)info forName:(NSString *)name {</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  NIDASSERT(nil != name);</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span> (nil == name) {</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  }</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">// Storing in the cache counts as an access of the object, so we update the access time.</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  [<span class="keyword">self</span> updateAccessTimeForInfo:info];</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordtype">id</span> previousObject = [<span class="keyword">self</span> cacheInfoForName:name].object;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">if</span> ([<span class="keyword">self</span> shouldSetObject:info.object withName:name previousObject:previousObject]) {</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keyword">self</span>.cacheMap[name] = info;</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  [<span class="keyword">self</span> didSetObject:info.object withName:name];</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  }</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> - (void)removeCacheInfoForName:(NSString *)name {</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  NIDASSERT(nil != name);</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span> (nil == name) {</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  }</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  NIMemoryCacheInfo* cacheInfo = [<span class="keyword">self</span> cacheInfoForName:name];</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  [<span class="keyword">self</span> willRemoveObject:cacheInfo.object withName:name];</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  [<span class="keyword">self</span>.lruCacheObjects removeObject:cacheInfo];</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  [<span class="keyword">self</span>.cacheMap removeObjectForKey:name];</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  }</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> }</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="preprocessor">#pragma mark - Subclassing</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment">// Deprecated method.</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#willSetObject:withName:previousObject:"> 172</a></span> - (BOOL)willSetObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name previousObject:(<span class="keywordtype">id</span>)previousObject {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#shouldSetObject:withName:previousObject:">shouldSetObject</a>:object <a class="code" href="NIMemoryCache.html#shouldSetObject:withName:previousObject:">withName</a>:name <a class="code" href="NIMemoryCache.html#shouldSetObject:withName:previousObject:">previousObject</a>:previousObject];</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> </div>
<div class="line"><a name="l00176"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#shouldSetObject:withName:previousObject:"> 176</a></span> - (BOOL)shouldSetObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name previousObject:(<span class="keywordtype">id</span>)previousObject {</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">// Allow anything to be stored.</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">return</span> YES;</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"><a class="line" href="NIMemoryCache.html#didSetObject:withName:"> 181</a></span> - (void)didSetObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name {</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// No-op</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> }</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div>
<div class="line"><a name="l00185"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#willRemoveObject:withName:"> 185</a></span> - (void)willRemoveObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name {</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="comment">// No-op</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> }</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="preprocessor">#pragma mark - Public</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00191"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#storeObject:withName:"> 191</a></span> - (void)storeObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name {</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#storeObject:withName:expiresAfter:">storeObject</a>:object <a class="code" href="NIMemoryCache.html#storeObject:withName:expiresAfter:">withName</a>:name <a class="code" href="NIMemoryCache.html#storeObject:withName:expiresAfter:">expiresAfter</a>:nil];</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> }</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="line"><a name="l00197"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#storeObject:withName:expiresAfter:"> 197</a></span> - (void)storeObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name expiresAfter:(NSDate *)expirationDate {</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// Don't store nil objects in the cache.</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">if</span> (nil == <span class="keywordtype">object</span>) {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span> (nil != expirationDate && [[NSDate date] timeIntervalSinceDate:expirationDate] >= 0) {</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="comment">// The object being stored is already expired so remove the object from the cache altogether.</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#removeObjectWithName:">removeObjectWithName</a>:name];</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// We're done here.</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span> cacheInfoForName:name];</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="comment">// Create a new cache entry.</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">if</span> (nil == info) {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  info = [[NIMemoryCacheInfo alloc] init];</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  info.name = name;</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  }</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="comment">// Store the object in the cache item.</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  info.object = object;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="comment">// Override any existing expiration date.</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  info.expirationDate = expirationDate;</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="comment">// Commit the changes to the cache.</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  [<span class="keyword">self</span> setCacheInfo:info forName:name];</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  }</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div>
<div class="line"><a name="l00231"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#objectWithName:"> 231</a></span> - (id)objectWithName:(NSString *)name {</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span> cacheInfoForName:name];</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> </div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordtype">id</span> <span class="keywordtype">object</span> = nil;</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">if</span> (nil != info) {</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordflow">if</span> ([info hasExpired]) {</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#removeObjectWithName:">removeObjectWithName</a>:name];</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">// Update the access time whenever we fetch an object from the cache.</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  [<span class="keyword">self</span> updateAccessTimeForInfo:info];</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> </div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordtype">object</span> = info.object;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  }</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">return</span> object;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  }</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> }</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div>
<div class="line"><a name="l00253"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#containsObjectWithName:"> 253</a></span> - (BOOL)containsObjectWithName:(NSString *)name {</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span> cacheInfoForName:name];</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span> ([info hasExpired]) {</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#removeObjectWithName:">removeObjectWithName</a>:name];</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">return</span> NO;</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">return</span> (nil != info);</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  }</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> }</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div>
<div class="line"><a name="l00266"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#dateOfLastAccessWithName:"> 266</a></span> - (NSDate *)dateOfLastAccessWithName:(NSString *)name {</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span> cacheInfoForName:name];</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> ([info hasExpired]) {</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#removeObjectWithName:">removeObjectWithName</a>:name];</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">return</span> nil;</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">return</span> [info lastAccessTime];</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> }</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a name="l00279"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#nameOfLeastRecentlyUsedObject"> 279</a></span> - (NSString *)<a class="code" href="NIMemoryCache.html#nameOfLeastRecentlyUsedObject">nameOfLeastRecentlyUsedObject</a> {</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span>.lruCacheObjects firstObject];</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> </div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">if</span> ([info hasExpired]) {</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#removeObjectWithName:">removeObjectWithName</a>:info.name];</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">return</span> nil;</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">return</span> info.name;</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  }</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> }</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> </div>
<div class="line"><a name="l00292"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#nameOfMostRecentlyUsedObject"> 292</a></span> - (NSString *)<a class="code" href="NIMemoryCache.html#nameOfMostRecentlyUsedObject">nameOfMostRecentlyUsedObject</a> {</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span>.lruCacheObjects lastObject];</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">if</span> ([info hasExpired]) {</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#removeObjectWithName:">removeObjectWithName</a>:info.name];</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> nil;</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">return</span> info.name;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  }</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> }</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> </div>
<div class="line"><a name="l00305"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#removeObjectWithName:"> 305</a></span> - (void)removeObjectWithName:(NSString *)name {</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  [<span class="keyword">self</span> removeCacheInfoForName:name];</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  }</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> }</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> </div>
<div class="line"><a name="l00311"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#removeAllObjectsWithPrefix:"> 311</a></span> - (void)removeAllObjectsWithPrefix:(NSString *)prefix {</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="comment">// Assertions fire if you try to modify the object you're iterating over, so we make a copy.</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">for</span> (NSString* name in [<span class="keyword">self</span>.cacheMap copy]) {</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">if</span> ([name hasPrefix:prefix]) {</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  [<span class="keyword">self</span> <a class="code" href="NIMemoryCache.html#removeObjectWithName:">removeObjectWithName</a>:name];</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  }</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  }</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  }</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> }</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> </div>
<div class="line"><a name="l00322"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#removeAllObjects"> 322</a></span> - (void)<a class="code" href="NIMemoryCache.html#removeAllObjects">removeAllObjects</a> {</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  [<span class="keyword">self</span>.cacheMap <a class="code" href="NIMemoryCache.html#removeAllObjects">removeAllObjects</a>];</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  [<span class="keyword">self</span>.lruCacheObjects <a class="code" href="NIMemoryCache.html#removeAllObjects">removeAllObjects</a>];</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> }</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> </div>
<div class="line"><a name="l00329"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#reduceMemoryUsage"> 329</a></span> - (void)<a class="code" href="NIMemoryCache.html#reduceMemoryUsage">reduceMemoryUsage</a> {</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="comment">// Assertions fire if you try to modify the object you're iterating over, so we make a copy.</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">for</span> (<span class="keywordtype">id</span> name in [<span class="keyword">self</span>.cacheMap copy]) {</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span> cacheInfoForName:name];</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">if</span> ([info hasExpired]) {</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  [<span class="keyword">self</span> removeCacheInfoForName:name];</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  }</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  }</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  }</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> }</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> </div>
<div class="line"><a name="l00342"></a><span class="lineno"><a class="line" href="NIMemoryCache.html#count"> 342</a></span> - (NSUInteger)<a class="code" href="NIMemoryCache.html#count">count</a> {</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">return</span> <span class="keyword">self</span>.cacheMap.count;</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> }</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> </div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="keyword">@end</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="keyword">@implementation </span>NIMemoryCacheInfo</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> </div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> - (BOOL)hasExpired {</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">return</span> (nil != _expirationDate</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  && [[NSDate date] timeIntervalSinceDate:_expirationDate] >= 0);</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> }</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> - (NSString *)description {</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">return</span> [NSString stringWithFormat:</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  @"<%@"</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  @" name: %@"</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  @" object: %@"</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  @" expiration date: %@"</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  @" last access time: %@"</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  @">",</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  [<span class="keyword">super</span> description],</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  self.name,</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  self.object,</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  self.expirationDate,</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  self.lastAccessTime];</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> }</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="keyword">@end</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> </div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="keyword">@interface </span><a class="code" href="NIImageMemoryCache.html">NIImageMemoryCache</a>()</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="keyword">@property</span> (nonatomic, assign) <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <a class="code" href="NIImageMemoryCache.html#numberOfPixels">numberOfPixels</a>;</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="keyword">@end</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span> </div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> <span class="keyword">@implementation </span><a class="code" href="NIImageMemoryCache.html">NIImageMemoryCache</a></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> </div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> - (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> long)numberOfPixelsUsedByImage:(UIImage *)image {</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordflow">if</span> (nil == image) {</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  }</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> </div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <span class="keywordflow">return</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>)(image.size.width * image.size.height * [image scale] * [image scale]);</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  }</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> }</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> </div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> - (void)<a class="code" href="NIMemoryCache.html#removeAllObjects">removeAllObjects</a> {</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  [<span class="keyword">super</span> removeAllObjects];</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> </div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keyword">self</span>.numberOfPixels = 0;</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  }</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> }</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> - (void)<a class="code" href="NIMemoryCache.html#reduceMemoryUsage">reduceMemoryUsage</a> {</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="comment">// Remove all expired images first.</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  [<span class="keyword">super</span> reduceMemoryUsage];</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">if</span> (<span class="keyword">self</span>.<a class="code" href="NIImageMemoryCache.html#maxNumberOfPixelsUnderStress">maxNumberOfPixelsUnderStress</a> > 0) {</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="comment">// Remove the least recently used images by iterating over the linked list.</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">while</span> (<span class="keyword">self</span>.<a class="code" href="NIImageMemoryCache.html#numberOfPixels">numberOfPixels</a> > <span class="keyword">self</span>.<a class="code" href="NIImageMemoryCache.html#maxNumberOfPixelsUnderStress">maxNumberOfPixelsUnderStress</a>) {</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span>.lruCacheObjects firstObject];</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  [<span class="keyword">self</span> removeCacheInfoForName:info.name];</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  }</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  }</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> }</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> </div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span> - (BOOL)shouldSetObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name previousObject:(<span class="keywordtype">id</span>)previousObject {</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  NIDASSERT(nil == <span class="keywordtype">object</span> || [<span class="keywordtype">object</span> isKindOfClass:[UIImage <span class="keyword">class</span>]]);</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keywordflow">if</span> (![<span class="keywordtype">object</span> isKindOfClass:[UIImage <span class="keyword">class</span>]]) {</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordflow">return</span> NO;</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  }</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span> </div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  _numberOfPixels -= [self numberOfPixelsUsedByImage:previousObject];</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  _numberOfPixels += [self numberOfPixelsUsedByImage:object];</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">return</span> YES;</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  }</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> }</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> </div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> - (void)didSetObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name {</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="comment">// Reduce the cache size after the object has been set in case the cache size is smaller</span></div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="comment">// than the object that's being added and we need to remove this object right away.</span></div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordflow">if</span> (<span class="keyword">self</span>.<a class="code" href="NIImageMemoryCache.html#maxNumberOfPixels">maxNumberOfPixels</a> > 0) {</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="comment">// Remove least recently used images until we satisfy our memory constraints.</span></div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keywordflow">while</span> (<span class="keyword">self</span>.<a class="code" href="NIImageMemoryCache.html#numberOfPixels">numberOfPixels</a> > <span class="keyword">self</span>.<a class="code" href="NIImageMemoryCache.html#maxNumberOfPixels">maxNumberOfPixels</a>) {</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  NIMemoryCacheInfo* info = [<span class="keyword">self</span>.lruCacheObjects firstObject];</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  [<span class="keyword">self</span> removeCacheInfoForName:info.name];</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  }</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  }</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  }</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> }</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> </div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> - (void)willRemoveObject:(<span class="keywordtype">id</span>)object withName:(NSString *)name {</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  @<span class="keyword">synchronized</span>(<span class="keyword">self</span>) {</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  NIDASSERT(nil == <span class="keywordtype">object</span> || [<span class="keywordtype">object</span> isKindOfClass:[UIImage <span class="keyword">class</span>]]);</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">if</span> (nil == <span class="keywordtype">object</span> || ![<span class="keywordtype">object</span> isKindOfClass:[UIImage <span class="keyword">class</span>]]) {</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  }</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> </div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keyword">self</span>.numberOfPixels -= [self numberOfPixelsUsedByImage:object];</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  }</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> }</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span> </div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="keyword">@end</span></div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div>
<div class="ttc" id="NIMemoryCache_html_removeAllObjects"><div class="ttname"><a href="NIMemoryCache.html#removeAllObjects">-[NIMemoryCache removeAllObjects]</a></div><div class="ttdeci">void removeAllObjects()</div><div class="ttdoc">Removes all objects from the cache, regardless of expiration dates. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00322">NIInMemoryCache.m:322</a></div></div>
<div class="ttc" id="NIMemoryCache_html"><div class="ttname"><a href="NIMemoryCache.html">NIMemoryCache</a></div><div class="ttdoc">An in-memory cache for storing objects with expiration support. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8h_source.html#l00038">NIInMemoryCache.h:38</a></div></div>
<div class="ttc" id="NIMemoryCache_html_reduceMemoryUsage"><div class="ttname"><a href="NIMemoryCache.html#reduceMemoryUsage">-[NIMemoryCache reduceMemoryUsage]</a></div><div class="ttdeci">void reduceMemoryUsage()</div><div class="ttdoc">Removes all expired objects from the cache. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00329">NIInMemoryCache.m:329</a></div></div>
<div class="ttc" id="NIMemoryCache_html_storeObject:withName:expiresAfter:"><div class="ttname"><a href="NIMemoryCache.html#storeObject:withName:expiresAfter:">-[NIMemoryCache storeObject:withName:expiresAfter:]</a></div><div class="ttdeci">void storeObject:withName:expiresAfter:(id object,[withName] NSString *name,[expiresAfter] NSDate *expirationDate)</div><div class="ttdoc">Stores an object in the cache with an expiration date. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00197">NIInMemoryCache.m:197</a></div></div>
<div class="ttc" id="NIMemoryCache_html_shouldSetObject:withName:previousObject:"><div class="ttname"><a href="NIMemoryCache.html#shouldSetObject:withName:previousObject:">-[NIMemoryCache shouldSetObject:withName:previousObject:]</a></div><div class="ttdeci">BOOL shouldSetObject:withName:previousObject:(id object,[withName] NSString *name,[previousObject] id previousObject)</div><div class="ttdoc">An object is about to be stored in the cache. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00176">NIInMemoryCache.m:176</a></div></div>
<div class="ttc" id="NIImageMemoryCache_html"><div class="ttname"><a href="NIImageMemoryCache.html">NIImageMemoryCache</a></div><div class="ttdoc">An in-memory cache for storing images with caps on the total number of pixels. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8h_source.html#l00091">NIInMemoryCache.h:91</a></div></div>
<div class="ttc" id="NIImageMemoryCache_html_numberOfPixels"><div class="ttname"><a href="NIImageMemoryCache.html#numberOfPixels">NIImageMemoryCache::numberOfPixels</a></div><div class="ttdeci">unsigned long long numberOfPixels</div><div class="ttdoc">Returns the total number of pixels being stored in the cache. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8h_source.html#l00093">NIInMemoryCache.h:93</a></div></div>
<div class="ttc" id="NIMemoryCache_html_nameOfMostRecentlyUsedObject"><div class="ttname"><a href="NIMemoryCache.html#nameOfMostRecentlyUsedObject">-[NIMemoryCache nameOfMostRecentlyUsedObject]</a></div><div class="ttdeci">NSString * nameOfMostRecentlyUsedObject()</div><div class="ttdoc">Retrieve the key with the most fresh access. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00292">NIInMemoryCache.m:292</a></div></div>
<div class="ttc" id="NIImageMemoryCache_html_maxNumberOfPixelsUnderStress"><div class="ttname"><a href="NIImageMemoryCache.html#maxNumberOfPixelsUnderStress">NIImageMemoryCache::maxNumberOfPixelsUnderStress</a></div><div class="ttdeci">unsigned long long maxNumberOfPixelsUnderStress</div><div class="ttdoc">The maximum number of pixels this cache may store after a call to reduceMemoryUsage. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8h_source.html#l00096">NIInMemoryCache.h:96</a></div></div>
<div class="ttc" id="NIMemoryCache_html_removeObjectWithName:"><div class="ttname"><a href="NIMemoryCache.html#removeObjectWithName:">-[NIMemoryCache removeObjectWithName:]</a></div><div class="ttdeci">void removeObjectWithName:(NSString *name)</div><div class="ttdoc">Removes an object from the cache with the given name. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00305">NIInMemoryCache.m:305</a></div></div>
<div class="ttc" id="NIMemoryCache_html_count"><div class="ttname"><a href="NIMemoryCache.html#count">-[NIMemoryCache count]</a></div><div class="ttdeci">NSUInteger count()</div><div class="ttdoc">Returns the number of objects currently in the cache. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00342">NIInMemoryCache.m:342</a></div></div>
<div class="ttc" id="NIImageMemoryCache_html_maxNumberOfPixels"><div class="ttname"><a href="NIImageMemoryCache.html#maxNumberOfPixels">NIImageMemoryCache::maxNumberOfPixels</a></div><div class="ttdeci">unsigned long long maxNumberOfPixels</div><div class="ttdoc">The maximum number of pixels this cache may ever store. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8h_source.html#l00095">NIInMemoryCache.h:95</a></div></div>
<div class="ttc" id="NIMemoryCache_html_nameOfLeastRecentlyUsedObject"><div class="ttname"><a href="NIMemoryCache.html#nameOfLeastRecentlyUsedObject">-[NIMemoryCache nameOfLeastRecentlyUsedObject]</a></div><div class="ttdeci">NSString * nameOfLeastRecentlyUsedObject()</div><div class="ttdoc">Retrieve the name of the object that was least recently used. </div><div class="ttdef"><b>Definition:</b> <a href="NIInMemoryCache_8m_source.html#l00279">NIInMemoryCache.m:279</a></div></div>
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