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<div id="projectname">properties-cpp
 <span id="projectnumber">0.0.1</span>
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<div id="projectbrief">A very simple convenience library for handling properties and signals in C++11.</div>
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<div class="title">signal.h</div> </div>
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<a href="signal_8h.html">Go to the documentation of this file.</a><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 © 2013 Canonical Ltd.</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"> * This program is free software: you can redistribute it and/or modify it</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * under the terms of the GNU Lesser General Public License version 3,</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * as published by the Free Software Foundation.</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"> * This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * GNU Lesser General Public License for more details.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public License</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * along with this program. If not, see <http://www.gnu.org/licenses/>.</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> <span class="comment"> * Authored by: Thomas Voß <thomas.voss@canonical.com></span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#ifndef COM_UBUNTU_SIGNAL_H_</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#define COM_UBUNTU_SIGNAL_H_</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <<a class="code" href="connection_8h.html">core/connection.h</a>></span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <functional></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <iostream></span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <list></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <mutex></span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <set></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">namespace </span>core</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> {</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">template</span><<span class="keyword">typename</span> ...Arguments></div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classcore_1_1Signal.html"> 36</a></span> <span class="keyword">class </span><a class="code" href="classcore_1_1Signal.html">Signal</a></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="classcore_1_1Signal.html#a689a758a900edf115d984b494f1862f9"> 42</a></span>  <span class="keyword">typedef</span> std::function<void(Arguments...)> <a class="code" href="classcore_1_1Signal.html#a689a758a900edf115d984b494f1862f9">Slot</a>;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">struct </span>SlotWrapper</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">void</span> <a class="code" href="classcore_1_1Signal.html#aae0b7ab936c8c89656a2a5a50fddc229">operator()</a>(Arguments... args)</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  {</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  dispatcher(std::bind(slot, args...));</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  }</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="classcore_1_1Signal.html#a689a758a900edf115d984b494f1862f9">Slot</a> slot;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="classcore_1_1Connection.html#ac073a4aabc3e8d4b3c4e50b0ae3c809c">Connection::Dispatcher</a> dispatcher;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="classcore_1_1Connection.html">Connection</a> connection;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  };</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> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classcore_1_1Signal.html#ae8cdfa83633ce3cad9ae6fc49fb876bd"> 61</a></span>  <span class="keyword">inline</span> <a class="code" href="classcore_1_1Signal.html#ae8cdfa83633ce3cad9ae6fc49fb876bd">Signal</a>() noexcept(true) : d(new Private())</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  }</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div>
<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="classcore_1_1Signal.html#a9c321c7345617cb48786aea00fbe0ea8"> 65</a></span>  <span class="keyword">inline</span> <a class="code" href="classcore_1_1Signal.html#a9c321c7345617cb48786aea00fbe0ea8">~Signal</a>()</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  {</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  std::lock_guard<std::mutex> lg(d->guard);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> slot : d->slot_list)</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  slot.connection.reset();</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  }</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// Copy construction, assignment and equality comparison are disabled.</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="classcore_1_1Signal.html#ae8cdfa83633ce3cad9ae6fc49fb876bd">Signal</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal.html">Signal</a>&) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="classcore_1_1Signal.html">Signal</a>& <a class="code" href="classcore_1_1Signal.html#ac0326bc0eadc52c597bd5c405a5cdafe">operator=</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal.html">Signal</a>&) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordtype">bool</span> <a class="code" href="classcore_1_1Signal.html#a6acfe400a299ce8277630a2b4bd00539">operator==</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal.html">Signal</a>&) <span class="keyword">const</span> = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="classcore_1_1Signal.html#a0f982cab5160c5dedbbb13315f9d715a"> 86</a></span>  <span class="keyword">inline</span> <a class="code" href="classcore_1_1Connection.html">Connection</a> <a class="code" href="classcore_1_1Signal.html#a0f982cab5160c5dedbbb13315f9d715a">connect</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal.html#a689a758a900edf115d984b494f1862f9">Slot</a>& slot)<span class="keyword"> const</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">// Helpers to initialize an invalid connection.</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">static</span> <span class="keyword">const</span> Connection::Disconnector empty_disconnector{};</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">static</span> <span class="keyword">const</span> Connection::DispatcherInstaller empty_dispatcher_installer{};</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// The default dispatcher immediately executes the function object</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// provided as argument on whatever thread is currently running.</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="classcore_1_1Connection.html#ac073a4aabc3e8d4b3c4e50b0ae3c809c">Connection::Dispatcher</a> default_dispatcher</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  = [](<span class="keyword">const</span> std::function<void()>& handler) { handler(); };</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="classcore_1_1Connection.html">Connection</a> conn{empty_disconnector, empty_dispatcher_installer};</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>  std::lock_guard<std::mutex> lg(d->guard);</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>  <span class="keyword">auto</span> result = d->slot_list.insert(</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  d->slot_list.end(),</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  SlotWrapper{slot, default_dispatcher, conn});</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="comment">// We implicitly share our internal state with the connection here</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// by passing in our private bits contained in 'd' to the std::bind call.</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">// This admittedly uncommon approach allows us to cleanly manage connection</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">// and signal lifetimes without the need to mark everything as mutable.</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  conn.d->disconnector = std::bind(</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  &Private::disconnect_slot_for_iterator,</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  d,</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  result);</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  conn.d->dispatcher_installer = std::bind(</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  &Private::install_dispatcher_for_iterator,</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  d,</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  std::placeholders::_1,</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  result);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> conn;</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> </div>
<div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="classcore_1_1Signal.html#aae0b7ab936c8c89656a2a5a50fddc229"> 132</a></span>  <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classcore_1_1Signal.html#aae0b7ab936c8c89656a2a5a50fddc229">operator()</a>(Arguments... args)</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  {</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  std::lock_guard<std::mutex> lg(d->guard);</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> slot : d->slot_list)</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  {</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  slot(args...);</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keyword">struct </span>Private</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  {</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">typedef</span> std::list<SlotWrapper> SlotList;</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="keyword">inline</span> <span class="keywordtype">void</span> disconnect_slot_for_iterator(<span class="keyword">typename</span> SlotList::iterator it)</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  {</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  std::lock_guard<std::mutex> lg(guard);</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  slot_list.erase(it);</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>  <span class="keyword">inline</span> <span class="keywordtype">void</span> install_dispatcher_for_iterator(<span class="keyword">const</span> <a class="code" href="classcore_1_1Connection.html#ac073a4aabc3e8d4b3c4e50b0ae3c809c">Connection::Dispatcher</a>& dispatcher,</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keyword">typename</span> SlotList::iterator it)</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  {</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  std::lock_guard<std::mutex> lg(guard);</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  it->dispatcher = dispatcher;</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="l00159"></a><span class="lineno"> 159</span>  std::mutex guard;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  SlotList slot_list;</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  };</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  std::shared_ptr<Private> d;</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> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">template</span><></div>
<div class="line"><a name="l00170"></a><span class="lineno"><a class="line" href="classcore_1_1Signal_3_01void_01_4.html"> 170</a></span> <span class="keyword">class </span><a class="code" href="classcore_1_1Signal.html">Signal</a><void></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> {</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00176"></a><span class="lineno"><a class="line" href="classcore_1_1Signal_3_01void_01_4.html#a7586e2d3dd5ce424b2f6fcef580013a1"> 176</a></span>  <span class="keyword">typedef</span> std::function<void()> <a class="code" href="classcore_1_1Signal_3_01void_01_4.html#a7586e2d3dd5ce424b2f6fcef580013a1">Slot</a>;</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> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">struct </span>SlotWrapper</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>  <span class="keywordtype">void</span> <a class="code" href="classcore_1_1Signal.html#aae0b7ab936c8c89656a2a5a50fddc229">operator()</a>()</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>  dispatcher(slot);</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="classcore_1_1Signal_3_01void_01_4.html#a7586e2d3dd5ce424b2f6fcef580013a1">Slot</a> slot;</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <a class="code" href="classcore_1_1Connection.html#ac073a4aabc3e8d4b3c4e50b0ae3c809c">Connection::Dispatcher</a> dispatcher;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <a class="code" href="classcore_1_1Connection.html">Connection</a> connection;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  };</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="keyword">public</span>:</div>
<div class="line"><a name="l00195"></a><span class="lineno"><a class="line" href="classcore_1_1Signal_3_01void_01_4.html#a00a9d93cb4b745253a601fb238f79607"> 195</a></span>  <span class="keyword">inline</span> <a class="code" href="classcore_1_1Signal_3_01void_01_4.html#a00a9d93cb4b745253a601fb238f79607">Signal</a>() noexcept(true) : d(new Private())</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  {</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  }</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div>
<div class="line"><a name="l00199"></a><span class="lineno"><a class="line" href="classcore_1_1Signal_3_01void_01_4.html#a6d5b15b3a4f0d5365932300a93f872c8"> 199</a></span>  <span class="keyword">inline</span> <a class="code" href="classcore_1_1Signal_3_01void_01_4.html#a6d5b15b3a4f0d5365932300a93f872c8">~Signal</a>()</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  std::lock_guard<std::mutex> lg(d->guard);</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> slot : d->slot_list)</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  slot.connection.reset();</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> </div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">// Copy construction, assignment and equality comparison are disabled.</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <a class="code" href="classcore_1_1Signal.html#ae8cdfa83633ce3cad9ae6fc49fb876bd">Signal</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal.html">Signal</a>&) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <a class="code" href="classcore_1_1Signal.html">Signal</a>& <a class="code" href="classcore_1_1Signal.html#ac0326bc0eadc52c597bd5c405a5cdafe">operator=</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal.html">Signal</a>&) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordtype">bool</span> <a class="code" href="classcore_1_1Signal.html#a6acfe400a299ce8277630a2b4bd00539">operator==</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal.html">Signal</a>&) <span class="keyword">const</span> = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div>
<div class="line"><a name="l00220"></a><span class="lineno"><a class="line" href="classcore_1_1Signal_3_01void_01_4.html#a80fc273ecde19f13892ce704b7e745d2"> 220</a></span>  <span class="keyword">inline</span> <a class="code" href="classcore_1_1Connection.html">Connection</a> <a class="code" href="classcore_1_1Signal_3_01void_01_4.html#a80fc273ecde19f13892ce704b7e745d2">connect</a>(<span class="keyword">const</span> <a class="code" href="classcore_1_1Signal_3_01void_01_4.html#a7586e2d3dd5ce424b2f6fcef580013a1">Slot</a>& slot)<span class="keyword"> const</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="keyword"> </span>{</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// Helpers to initialize an invalid connection.</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">static</span> <span class="keyword">const</span> Connection::Disconnector empty_disconnector{};</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keyword">static</span> <span class="keyword">const</span> Connection::DispatcherInstaller empty_dispatcher_installer{};</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">// The default dispatcher immediately executes the function object</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="comment">// provided as argument on whatever thread is currently running.</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="classcore_1_1Connection.html#ac073a4aabc3e8d4b3c4e50b0ae3c809c">Connection::Dispatcher</a> default_dispatcher</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  = [](<span class="keyword">const</span> std::function<void()>& handler) { handler(); };</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <a class="code" href="classcore_1_1Connection.html">Connection</a> conn{empty_disconnector, empty_dispatcher_installer};</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  std::lock_guard<std::mutex> lg(d->guard);</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="keyword">auto</span> result = d->slot_list.insert(</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  d->slot_list.end(),</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  SlotWrapper{slot, default_dispatcher, conn});</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">// We implicitly share our internal state with the connection here</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="comment">// by passing in our private bits contained in 'd' to the std::bind call.</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="comment">// This admittedly uncommon approach allows us to cleanly manage connection</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">// and signal lifetimes without the need to mark everything as mutable.</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  conn.d->disconnector = std::bind(</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  &Private::disconnect_slot_for_iterator,</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  d,</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  result);</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  conn.d->dispatcher_installer = std::bind(</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  &Private::install_dispatcher_for_iterator,</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  d,</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  std::placeholders::_1,</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  result);</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">return</span> conn;</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
<div class="line"><a name="l00263"></a><span class="lineno"><a class="line" href="classcore_1_1Signal_3_01void_01_4.html#a6b1003b84caa1926496071fa6fcc77f8"> 263</a></span>  <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classcore_1_1Signal_3_01void_01_4.html#a6b1003b84caa1926496071fa6fcc77f8">operator()</a>()</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>  std::lock_guard<std::mutex> lg(d->guard);</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">for</span>(<span class="keyword">auto</span> slot : d->slot_list)</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  {</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  slot();</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>  }</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">private</span>:</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keyword">struct </span>Private</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="keyword">typedef</span> std::list<SlotWrapper> SlotList;</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>  <span class="keyword">inline</span> <span class="keywordtype">void</span> disconnect_slot_for_iterator(<span class="keyword">typename</span> SlotList::iterator it)</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  {</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  std::lock_guard<std::mutex> lg(guard);</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  slot_list.erase(it);</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  }</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="keyword">inline</span> <span class="keywordtype">void</span> install_dispatcher_for_iterator(<span class="keyword">const</span> <a class="code" href="classcore_1_1Connection.html#ac073a4aabc3e8d4b3c4e50b0ae3c809c">Connection::Dispatcher</a>& dispatcher,</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keyword">typename</span> SlotList::iterator it)</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  {</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  std::lock_guard<std::mutex> lg(guard);</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  it->dispatcher = dispatcher;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  }</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>  std::mutex guard;</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  SlotList slot_list;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  };</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  std::shared_ptr<Private> d;</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> };</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> </div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="preprocessor">#endif // COM_UBUNTU_SIGNAL_H_</span></div>
<div class="ttc" id="connection_8h_html"><div class="ttname"><a href="connection_8h.html">connection.h</a></div></div>
<div class="ttc" id="classcore_1_1Signal_3_01void_01_4_html_a6b1003b84caa1926496071fa6fcc77f8"><div class="ttname"><a href="classcore_1_1Signal_3_01void_01_4.html#a6b1003b84caa1926496071fa6fcc77f8">core::Signal< void >::operator()</a></div><div class="ttdeci">void operator()()</div><div class="ttdoc">operator () emits the signal. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00263">signal.h:263</a></div></div>
<div class="ttc" id="classcore_1_1Connection_html"><div class="ttname"><a href="classcore_1_1Connection.html">core::Connection</a></div><div class="ttdoc">The Connection class models a signal-slot connection. </div><div class="ttdef"><b>Definition:</b> <a href="connection_8h_source.html#l00031">connection.h:31</a></div></div>
<div class="ttc" id="classcore_1_1Signal_3_01void_01_4_html_a80fc273ecde19f13892ce704b7e745d2"><div class="ttname"><a href="classcore_1_1Signal_3_01void_01_4.html#a80fc273ecde19f13892ce704b7e745d2">core::Signal< void >::connect</a></div><div class="ttdeci">Connection connect(const Slot &slot) const </div><div class="ttdoc">Connects the provided slot to this signal instance. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00220">signal.h:220</a></div></div>
<div class="ttc" id="classcore_1_1Signal_html_a0f982cab5160c5dedbbb13315f9d715a"><div class="ttname"><a href="classcore_1_1Signal.html#a0f982cab5160c5dedbbb13315f9d715a">core::Signal::connect</a></div><div class="ttdeci">Connection connect(const Slot &slot) const </div><div class="ttdoc">Connects the provided slot to this signal instance. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00086">signal.h:86</a></div></div>
<div class="ttc" id="classcore_1_1Signal_html_ae8cdfa83633ce3cad9ae6fc49fb876bd"><div class="ttname"><a href="classcore_1_1Signal.html#ae8cdfa83633ce3cad9ae6fc49fb876bd">core::Signal::Signal</a></div><div class="ttdeci">Signal() noexcept(true)</div><div class="ttdoc">Signal constructs a new instance. Never throws. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00061">signal.h:61</a></div></div>
<div class="ttc" id="classcore_1_1Signal_html_a689a758a900edf115d984b494f1862f9"><div class="ttname"><a href="classcore_1_1Signal.html#a689a758a900edf115d984b494f1862f9">core::Signal::Slot</a></div><div class="ttdeci">std::function< void(Arguments...)> Slot</div><div class="ttdoc">Slot is the function type that observers have to provide to connect to this signal. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00042">signal.h:42</a></div></div>
<div class="ttc" id="classcore_1_1Connection_html_ac073a4aabc3e8d4b3c4e50b0ae3c809c"><div class="ttname"><a href="classcore_1_1Connection.html#ac073a4aabc3e8d4b3c4e50b0ae3c809c">core::Connection::Dispatcher</a></div><div class="ttdeci">std::function< void(const std::function< void()> &)> Dispatcher</div><div class="ttdef"><b>Definition:</b> <a href="connection_8h_source.html#l00034">connection.h:34</a></div></div>
<div class="ttc" id="classcore_1_1Signal_3_01void_01_4_html_a7586e2d3dd5ce424b2f6fcef580013a1"><div class="ttname"><a href="classcore_1_1Signal_3_01void_01_4.html#a7586e2d3dd5ce424b2f6fcef580013a1">core::Signal< void >::Slot</a></div><div class="ttdeci">std::function< void()> Slot</div><div class="ttdoc">Slot is the function type that observers have to provide to connect to this signal. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00176">signal.h:176</a></div></div>
<div class="ttc" id="classcore_1_1Signal_html_a9c321c7345617cb48786aea00fbe0ea8"><div class="ttname"><a href="classcore_1_1Signal.html#a9c321c7345617cb48786aea00fbe0ea8">core::Signal::~Signal</a></div><div class="ttdeci">~Signal()</div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00065">signal.h:65</a></div></div>
<div class="ttc" id="classcore_1_1Signal_3_01void_01_4_html_a6d5b15b3a4f0d5365932300a93f872c8"><div class="ttname"><a href="classcore_1_1Signal_3_01void_01_4.html#a6d5b15b3a4f0d5365932300a93f872c8">core::Signal< void >::~Signal</a></div><div class="ttdeci">~Signal()</div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00199">signal.h:199</a></div></div>
<div class="ttc" id="classcore_1_1Signal_html"><div class="ttname"><a href="classcore_1_1Signal.html">core::Signal</a></div><div class="ttdoc">A signal class that observers can subscribe to. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00036">signal.h:36</a></div></div>
<div class="ttc" id="classcore_1_1Signal_html_ac0326bc0eadc52c597bd5c405a5cdafe"><div class="ttname"><a href="classcore_1_1Signal.html#ac0326bc0eadc52c597bd5c405a5cdafe">core::Signal::operator=</a></div><div class="ttdeci">Signal & operator=(const Signal &)=delete</div></div>
<div class="ttc" id="classcore_1_1Signal_3_01void_01_4_html_a00a9d93cb4b745253a601fb238f79607"><div class="ttname"><a href="classcore_1_1Signal_3_01void_01_4.html#a00a9d93cb4b745253a601fb238f79607">core::Signal< void >::Signal</a></div><div class="ttdeci">Signal() noexcept(true)</div><div class="ttdoc">Signal constructs a new instance. Never throws. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00195">signal.h:195</a></div></div>
<div class="ttc" id="classcore_1_1Signal_html_a6acfe400a299ce8277630a2b4bd00539"><div class="ttname"><a href="classcore_1_1Signal.html#a6acfe400a299ce8277630a2b4bd00539">core::Signal::operator==</a></div><div class="ttdeci">bool operator==(const Signal &) const =delete</div></div>
<div class="ttc" id="classcore_1_1Signal_html_aae0b7ab936c8c89656a2a5a50fddc229"><div class="ttname"><a href="classcore_1_1Signal.html#aae0b7ab936c8c89656a2a5a50fddc229">core::Signal::operator()</a></div><div class="ttdeci">void operator()(Arguments...args)</div><div class="ttdoc">operator () emits the signal with the provided parameters. </div><div class="ttdef"><b>Definition:</b> <a href="signal_8h_source.html#l00132">signal.h:132</a></div></div>
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