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Posted to commits@mesos.apache.org by gi...@apache.org on 2018/05/23 23:55:36 UTC
[24/26] mesos-site git commit: Updated the website built from mesos
SHA: 3d2a1fd.
http://git-wip-us.apache.org/repos/asf/mesos-site/blob/805f4c5b/content/api/latest/c++/3rdparty_2libprocess_2include_2process_2shared_8hpp_source.html
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<div class="title">shared.hpp</div> </div>
</div><!--header-->
<div class="contents">
-<a href="3rdparty_2libprocess_2include_2process_2shared_8hpp.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">// Licensed under the Apache License, Version 2.0 (the "License");</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6<
/span> <span class="comment">//</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// limitations under the License</span></div><div class="line"><a name="l00012"></a><span class="lineno
"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __PROCESS_SHARED_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __PROCESS_SHARED_HPP__</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <atomic></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <cstddef></span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span
class="preprocessor">#include <glog/logging.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">#include <<a class="code" href="future_8hpp.html">process/future.hpp</a>></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="keyword">namespace </span><a class="code" href="namespaceprocess.html">process</a> {</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// Forward declaration.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></
div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">class </span>Owned;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// Represents a shared pointer and therefore enforces 'const' access.</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">class </span>Shared</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">public</span>:</div><div class=
"line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared</a>();</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">explicit</span> <a class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared</a>(T* t);</div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a4ac3920f87773fe101014b3f7b6e555d"> 38</a></span>  <span class="comment">/*implicit*/</span> <a class="code" href="classprocess_1_1Shared.html#a4ac3920f87773fe101014b3f7b6e555d">Shared</a>(std::nullptr_t) : <a class="code" href="classprocess_1_1Shared.html">Shared</a>(static_cast<T*>(nullptr)) {}</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span c
lass="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a3c929e667ce6a6fd45b56a81fd16a766">operator==</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that) <span class="keyword">const</span>;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">bool</span> operator<(const Shared<T>& that) <span class="keyword">const</span>;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// Enforces const access semantics.</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">const</span> T& <a class="code" href="classprocess_1_1Shared.html#ae2f71627879ac69d8732d70f2cf5810b">operator*</a>() <span class="keyword">const</span>;</div><div
class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">const</span> T* <a class="code" href="classprocess_1_1Shared.html#aeb4d74c937660e50c912d79bb84ef754">operator-></a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">const</span> T* <span class="keyword">get</span>() <span class="keyword">const</span>;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a5a4fd275e890e3c5e81dd7aed1d804b0">unique</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">void</span> <
a class="code" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">reset</a>();</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">reset</a>(T* t);</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#a19e2e0a3ef672d789324ff92db6e30dc">swap</a>(<a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that);</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// Transfers ownership of the pointer by waiting for exclusive</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">// acce
ss (i.e., no other Shared instances). This shared pointer</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// will be reset after this function is invoked. If multiple shared</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// pointers pointing to the same object all want to be upgraded,</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// only one of them may succeed and the rest will get failures.</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="classprocess_1_1Future.html">Future<Owned<T></a>> <a class="code" href="classprocess_1_1Shared.html#a84986b276de9b6d1b525c64d944c6797">own</a>();</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a>
<span class="lineno"> 61</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">struct </span>Data</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>  <span class="keyword">explicit</span> Data(T* _t);</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  ~Data();</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>  T* t;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  std::atomic_bool owned;</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="classprocess_1_1Promise.html">Promise<Owned<T></a>> <a class="co
de" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>;</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>  std::shared_ptr<Data> data;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> };</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401"> 77</a></span> <a
class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared<T>::Shared</a>() {}</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#abb6c5ab0f711bdee4455201e4a812d47"> 81</a></span> <a class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared<T>::Shared</a>(T* t)</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>  <span class="keywordflow">if</span> (t != <span class="keyword">nullptr</span>) {</
div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  data.reset(<span class="keyword">new</span> Data(t));</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</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"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a3c929e667ce6a6fd45b56a81fd16a766"> 90</a></span> <span class="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a3c929e667ce6a6fd45b56a81fd16a766">Shared<T>::operator==</a>(<span class="keyword"
>const</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that)<span class="keyword"> const</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keyword"></span>{</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> data == that.data;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a8dab66aa15e3b5dafa463bb485bddbbd"> 97</a></span> <span class="k
eywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a8dab66aa15e3b5dafa463bb485bddbbd">Shared<T>::operator<</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that)<span class="keyword"> const</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword"></span>{</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> data < that.data;</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> </div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="lin
e"><a name="l00104"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#ae2f71627879ac69d8732d70f2cf5810b"> 104</a></span> <span class="keyword">const</span> T& <a class="code" href="classprocess_1_1Shared.html#ae2f71627879ac69d8732d70f2cf5810b">Shared<T>::operator*</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword"></span>{</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> *CHECK_NOTNULL(<span class="keyword">get</span>());</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> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword">t
emplate</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#aeb4d74c937660e50c912d79bb84ef754"> 111</a></span> <span class="keyword">const</span> T* <a class="code" href="classprocess_1_1Shared.html#aeb4d74c937660e50c912d79bb84ef754">Shared<T>::operator-></a>()<span class="keyword"> const</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keyword"></span>{</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">return</span> CHECK_NOTNULL(<span class="keyword">get</span>());</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> }</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><
a name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a1826ec84528910fcec813d35993a1fd4"> 118</a></span> <span class="keyword">const</span> T* <a class="code" href="classprocess_1_1Shared.html#a1826ec84528910fcec813d35993a1fd4">Shared<T>::get</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="keyword"></span>{</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> (data == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00122"></a><s
pan class="lineno"> 122</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> data->t;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a5a4fd275e890e3c5e81dd7aed1d804b0"> 129</a></span> <span class="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a5a4fd27
5e890e3c5e81dd7aed1d804b0">Shared<T>::unique</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="keyword"></span>{</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">return</span> data.unique();</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> </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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906"> 136</a></span> <span class="keywordtype">void</span> <a class="code" hre
f="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">Shared<T>::reset</a>()</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  data.reset();</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> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00143"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#aa5eeda331799e0c747c0ccb1fed90bc5"> 143</a></span> <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">S
hared<T>::reset</a>(T* t)</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> {</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">if</span> (t == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  data.reset();</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  data.reset(<span class="keyword">new</span> Data(t));</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00154"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a19e2e0a3ef672d789324ff92db6e30dc"> 154</a></span> <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#a19e2e0a3ef672d789324ff92db6e30dc">Shared<T>::swap</a>(<a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that)</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> {</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  data.swap(that.data);</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"> 1
59</span> </div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00161"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a84986b276de9b6d1b525c64d944c6797"> 161</a></span> <a class="code" href="classprocess_1_1Future.html">Future<Owned<T></a>> <a class="code" href="classprocess_1_1Shared.html#a84986b276de9b6d1b525c64d944c6797">Shared<T>::own</a>()</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> {</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">// If two threads simultaneously access this object and at least one</span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="comment">// of them is a write, the behavior is undefined. This is similar to<
/span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="comment">// boost::shared_ptr. For more details, please refer to the boost</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="comment">// shared_ptr document (section "Thread Safety").</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">if</span> (data == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">return</span> <a class="code" href="classprocess_1_1Owned.html">Owned<T></a>(<span class="keyword">nullptr</span>);</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div><div class="line"><a name="l00171"></a><span class="lin
eno"> 171</span>  <span class="keywordtype">bool</span> false_value = <span class="keyword">false</span>;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">if</span> (!data->owned.compare_exchange_strong(false_value, <span class="keyword">true</span>)) {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> <a class="code" href="structprocess_1_1Failure.html">Failure</a>(<span class="stringliteral">"Ownership has already been transferred"</span>);</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <a class="code" href="classprocess_1_1Future.html">Future<Owned<T></a>> future = data->promise.future();</div><div class
="line"><a name="l00177"></a><span class="lineno"> 177</span>  data.reset();</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">return</span> future;</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> }</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T>::Data::Data</a>(T* _t)</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  : t(CHECK_NOTNULL(_t)), owned(<span class="keyword">false</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> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T>::Data::~Data</a>()</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>  <span class="keywordflow">if</span> (owned.load()) {</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.set(<a class="code" href="classprocess_1_1Owned.html">Owned<T></a>(t));</div><div clas
s="line"><a name="l00192"></a><span class="lineno"> 192</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keyword">delete</span> t;</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"> 197</span> } <span class="comment">// namespace process {</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"> 199</span> <span class="preprocessor">#endif // __PROCESS_SHARED_HPP__</span></div><div class="ttc" id="structprocess_1_1Failure_html"><div class="ttname"><a href="structprocess_1_1Failure.html">process::Failu
re</a></div><div class="ttdef"><b>Definition:</b> future.hpp:665</div></div>
+<a href="3rdparty_2libprocess_2include_2process_2shared_8hpp.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">// Licensed under the Apache License, Version 2.0 (the "License");</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6<
/span> <span class="comment">//</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// limitations under the License</span></div><div class="line"><a name="l00012"></a><span class="lineno
"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifndef __PROCESS_SHARED_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __PROCESS_SHARED_HPP__</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <atomic></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <cstddef></span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span
class="preprocessor">#include <glog/logging.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">#include <<a class="code" href="future_8hpp.html">process/future.hpp</a>></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="keyword">namespace </span><a class="code" href="namespaceprocess.html">process</a> {</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// Forward declaration.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></
div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">class </span>Owned;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">// Represents a shared pointer and therefore enforces 'const' access.</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">class </span>Shared</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">public</span>:</div><div class=
"line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared</a>();</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">explicit</span> <a class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared</a>(T* t);</div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a4ac3920f87773fe101014b3f7b6e555d"> 38</a></span>  <span class="comment">/*implicit*/</span> <a class="code" href="classprocess_1_1Shared.html#a4ac3920f87773fe101014b3f7b6e555d">Shared</a>(std::nullptr_t) : <a class="code" href="classprocess_1_1Shared.html">Shared</a>(static_cast<T*>(nullptr)) {}</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span c
lass="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a3c929e667ce6a6fd45b56a81fd16a766">operator==</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that) <span class="keyword">const</span>;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">bool</span> operator<(const Shared<T>& that) <span class="keyword">const</span>;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// Enforces const access semantics.</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">const</span> T& <a class="code" href="classprocess_1_1Shared.html#ae2f71627879ac69d8732d70f2cf5810b">operator*</a>() <span class="keyword">const</span>;</div><div
class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">const</span> T* <a class="code" href="classprocess_1_1Shared.html#aeb4d74c937660e50c912d79bb84ef754">operator-></a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">const</span> T* <span class="keyword">get</span>() <span class="keyword">const</span>;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a5a4fd275e890e3c5e81dd7aed1d804b0">unique</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">void</span> <
a class="code" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">reset</a>();</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">reset</a>(T* t);</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#a19e2e0a3ef672d789324ff92db6e30dc">swap</a>(<a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that);</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// Transfers ownership of the pointer by waiting for exclusive</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="comment">// acce
ss (i.e., no other Shared instances). This shared pointer</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// will be reset after this function is invoked. If multiple shared</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="comment">// pointers pointing to the same object all want to be upgraded,</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// only one of them may succeed and the rest will get failures.</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="classprocess_1_1Future.html">Future<Owned<T></a>> <a class="code" href="classprocess_1_1Shared.html#a84986b276de9b6d1b525c64d944c6797">own</a>();</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a>
<span class="lineno"> 61</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">struct </span>Data</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>  <span class="keyword">explicit</span> Data(T* _t);</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  ~Data();</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>  T* t;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  std::atomic_bool owned;</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="classprocess_1_1Promise.html">Promise<Owned<T></a>> <a class="co
de" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>;</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>  std::shared_ptr<Data> data;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> };</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401"> 77</a></span> <a
class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared<T>::Shared</a>() {}</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#abb6c5ab0f711bdee4455201e4a812d47"> 81</a></span> <a class="code" href="classprocess_1_1Shared.html#aadaef640c97e060e83bf285bf9eac401">Shared<T>::Shared</a>(T* t)</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>  <span class="keywordflow">if</span> (t != <span class="keyword">nullptr</span>) {</
div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  data.reset(<span class="keyword">new</span> Data(t));</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</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"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a3c929e667ce6a6fd45b56a81fd16a766"> 90</a></span> <span class="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a3c929e667ce6a6fd45b56a81fd16a766">Shared<T>::operator==</a>(<span class="keyword"
>const</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that)<span class="keyword"> const</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keyword"></span>{</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> data == that.data;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a8dab66aa15e3b5dafa463bb485bddbbd"> 97</a></span> <span class="k
eywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a8dab66aa15e3b5dafa463bb485bddbbd">Shared<T>::operator<</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that)<span class="keyword"> const</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword"></span>{</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> data < that.data;</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> </div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="lin
e"><a name="l00104"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#ae2f71627879ac69d8732d70f2cf5810b"> 104</a></span> <span class="keyword">const</span> T& <a class="code" href="classprocess_1_1Shared.html#ae2f71627879ac69d8732d70f2cf5810b">Shared<T>::operator*</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword"></span>{</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> *CHECK_NOTNULL(<span class="keyword">get</span>());</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> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword">t
emplate</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#aeb4d74c937660e50c912d79bb84ef754"> 111</a></span> <span class="keyword">const</span> T* <a class="code" href="classprocess_1_1Shared.html#aeb4d74c937660e50c912d79bb84ef754">Shared<T>::operator-></a>()<span class="keyword"> const</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keyword"></span>{</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordflow">return</span> CHECK_NOTNULL(<span class="keyword">get</span>());</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> }</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><
a name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a1826ec84528910fcec813d35993a1fd4"> 118</a></span> <span class="keyword">const</span> T* <a class="code" href="classprocess_1_1Shared.html#a1826ec84528910fcec813d35993a1fd4">Shared<T>::get</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="keyword"></span>{</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">if</span> (data == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00122"></a><s
pan class="lineno"> 122</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> data->t;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a5a4fd275e890e3c5e81dd7aed1d804b0"> 129</a></span> <span class="keywordtype">bool</span> <a class="code" href="classprocess_1_1Shared.html#a5a4fd27
5e890e3c5e81dd7aed1d804b0">Shared<T>::unique</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="keyword"></span>{</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">return</span> data.unique();</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> </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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906"> 136</a></span> <span class="keywordtype">void</span> <a class="code" hre
f="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">Shared<T>::reset</a>()</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> {</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  data.reset();</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> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00143"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#aa5eeda331799e0c747c0ccb1fed90bc5"> 143</a></span> <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">S
hared<T>::reset</a>(T* t)</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> {</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">if</span> (t == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  data.reset();</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  data.reset(<span class="keyword">new</span> Data(t));</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00154"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a19e2e0a3ef672d789324ff92db6e30dc"> 154</a></span> <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1Shared.html#a19e2e0a3ef672d789324ff92db6e30dc">Shared<T>::swap</a>(<a class="code" href="classprocess_1_1Shared.html">Shared<T></a>& that)</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> {</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  data.swap(that.data);</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"> 1
59</span> </div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00161"></a><span class="lineno"><a class="line" href="classprocess_1_1Shared.html#a84986b276de9b6d1b525c64d944c6797"> 161</a></span> <a class="code" href="classprocess_1_1Future.html">Future<Owned<T></a>> <a class="code" href="classprocess_1_1Shared.html#a84986b276de9b6d1b525c64d944c6797">Shared<T>::own</a>()</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> {</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">// If two threads simultaneously access this object and at least one</span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="comment">// of them is a write, the behavior is undefined. This is similar to<
/span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="comment">// boost::shared_ptr. For more details, please refer to the boost</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="comment">// shared_ptr document (section "Thread Safety").</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">if</span> (data == <span class="keyword">nullptr</span>) {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">return</span> <a class="code" href="classprocess_1_1Owned.html">Owned<T></a>(<span class="keyword">nullptr</span>);</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div><div class="line"><a name="l00171"></a><span class="lin
eno"> 171</span>  <span class="keywordtype">bool</span> false_value = <span class="keyword">false</span>;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">if</span> (!data->owned.compare_exchange_strong(false_value, <span class="keyword">true</span>)) {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> <a class="code" href="structprocess_1_1Failure.html">Failure</a>(<span class="stringliteral">"Ownership has already been transferred"</span>);</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <a class="code" href="classprocess_1_1Future.html">Future<Owned<T></a>> future = data->promise.future();</div><div class
="line"><a name="l00177"></a><span class="lineno"> 177</span>  data.reset();</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">return</span> future;</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> }</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T>::Data::Data</a>(T* _t)</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  : t(CHECK_NOTNULL(_t)), owned(<span class="keyword">false</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> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <a class="code" href="classprocess_1_1Shared.html">Shared<T>::Data::~Data</a>()</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>  <span class="keywordflow">if</span> (owned.load()) {</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.set(<a class="code" href="classprocess_1_1Owned.html">Owned<T></a>(t));</div><div clas
s="line"><a name="l00192"></a><span class="lineno"> 192</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keyword">delete</span> t;</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"> 197</span> } <span class="comment">// namespace process {</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"> 199</span> <span class="preprocessor">#endif // __PROCESS_SHARED_HPP__</span></div><div class="ttc" id="structprocess_1_1Failure_html"><div class="ttname"><a href="structprocess_1_1Failure.html">process::Failu
re</a></div><div class="ttdef"><b>Definition:</b> future.hpp:668</div></div>
<div class="ttc" id="classprocess_1_1Shared_html_adb2203cf8bb3a39b42096e3cef47e906"><div class="ttname"><a href="classprocess_1_1Shared.html#adb2203cf8bb3a39b42096e3cef47e906">process::Shared::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdef"><b>Definition:</b> shared.hpp:136</div></div>
<div class="ttc" id="classprocess_1_1Shared_html_a8dab66aa15e3b5dafa463bb485bddbbd"><div class="ttname"><a href="classprocess_1_1Shared.html#a8dab66aa15e3b5dafa463bb485bddbbd">process::Shared::operator<</a></div><div class="ttdeci">bool operator<(const Shared< T > &that) const </div><div class="ttdef"><b>Definition:</b> shared.hpp:97</div></div>
<div class="ttc" id="classprocess_1_1Shared_html_a3c929e667ce6a6fd45b56a81fd16a766"><div class="ttname"><a href="classprocess_1_1Shared.html#a3c929e667ce6a6fd45b56a81fd16a766">process::Shared::operator==</a></div><div class="ttdeci">bool operator==(const Shared< T > &that) const </div><div class="ttdef"><b>Definition:</b> shared.hpp:90</div></div>
<div class="ttc" id="classprocess_1_1Shared_html"><div class="ttname"><a href="classprocess_1_1Shared.html">process::Shared</a></div><div class="ttdef"><b>Definition:</b> owned.hpp:26</div></div>
<div class="ttc" id="classprocess_1_1Shared_html_a5a4fd275e890e3c5e81dd7aed1d804b0"><div class="ttname"><a href="classprocess_1_1Shared.html#a5a4fd275e890e3c5e81dd7aed1d804b0">process::Shared::unique</a></div><div class="ttdeci">bool unique() const </div><div class="ttdef"><b>Definition:</b> shared.hpp:129</div></div>
-<div class="ttc" id="classprocess_1_1Promise_html"><div class="ttname"><a href="classprocess_1_1Promise.html">process::Promise</a></div><div class="ttdef"><b>Definition:</b> future.hpp:73</div></div>
+<div class="ttc" id="classprocess_1_1Promise_html"><div class="ttname"><a href="classprocess_1_1Promise.html">process::Promise</a></div><div class="ttdef"><b>Definition:</b> future.hpp:74</div></div>
<div class="ttc" id="namespacemesos_1_1internal_1_1log_1_1protocol_html_a3b1f8bd7b18c51af9d1f58842950b545"><div class="ttname"><a href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">mesos::internal::log::protocol::promise</a></div><div class="ttdeci">Protocol< PromiseRequest, PromiseResponse > promise</div></div>
<div class="ttc" id="future_8hpp_html"><div class="ttname"><a href="future_8hpp.html">future.hpp</a></div></div>
<div class="ttc" id="classprocess_1_1Shared_html_a4ac3920f87773fe101014b3f7b6e555d"><div class="ttname"><a href="classprocess_1_1Shared.html#a4ac3920f87773fe101014b3f7b6e555d">process::Shared::Shared</a></div><div class="ttdeci">Shared(std::nullptr_t)</div><div class="ttdef"><b>Definition:</b> shared.hpp:38</div></div>
@@ -70,7 +70,7 @@
<div class="ttc" id="classprocess_1_1Owned_html"><div class="ttname"><a href="classprocess_1_1Owned.html">process::Owned</a></div><div class="ttdef"><b>Definition:</b> owned.hpp:36</div></div>
<div class="ttc" id="classprocess_1_1Shared_html_a1826ec84528910fcec813d35993a1fd4"><div class="ttname"><a href="classprocess_1_1Shared.html#a1826ec84528910fcec813d35993a1fd4">process::Shared::get</a></div><div class="ttdeci">const T * get() const </div><div class="ttdef"><b>Definition:</b> shared.hpp:118</div></div>
<div class="ttc" id="classprocess_1_1Shared_html_a19e2e0a3ef672d789324ff92db6e30dc"><div class="ttname"><a href="classprocess_1_1Shared.html#a19e2e0a3ef672d789324ff92db6e30dc">process::Shared::swap</a></div><div class="ttdeci">void swap(Shared< T > &that)</div><div class="ttdef"><b>Definition:</b> shared.hpp:154</div></div>
-<div class="ttc" id="classprocess_1_1Future_html"><div class="ttname"><a href="classprocess_1_1Future.html">process::Future</a></div><div class="ttdef"><b>Definition:</b> future.hpp:57</div></div>
+<div class="ttc" id="classprocess_1_1Future_html"><div class="ttname"><a href="classprocess_1_1Future.html">process::Future</a></div><div class="ttdef"><b>Definition:</b> future.hpp:58</div></div>
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