http://git-wip-us.apache.org/repos/asf/mesos-site/blob/805f4c5b/content/api/latest/c++/loop_8hpp_source.html ---------------------------------------------------------------------- diff --git a/content/api/latest/c++/loop_8hpp_source.html b/content/api/latest/c++/loop_8hpp_source.html index ee89076..42517ee 100644 --- a/content/api/latest/c++/loop_8hpp_source.html +++ b/content/api/latest/c++/loop_8hpp_source.html @@ -53,31 +53,31 @@ </div><!--header--> <div class="contents"> <a href="loop_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_LOOP_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __PROCESS_LOOP_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 <mutex></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <<a class="code" href="defer_8hpp.html">process/defer.hpp</a>></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <<a class="code" href="dispatch_8hpp.html">process/dispatch.hpp</a>></span></div><div class="line" ><a name="l00020"></a><span class="lineno"> 20</span> <span >class="preprocessor">#include <<a class="code" >href="future_8hpp.html">process/future.hpp</a>></span></div><div >class="line"><a name="l00021"></a><span class="lineno"> >21</span> <span class="preprocessor">#include <<a class="code" >href="owned_8hpp.html">process/owned.hpp</a>></span></div><div >class="line"><a name="l00022"></a><span class="lineno"> >22</span> <span class="preprocessor">#include <<a class="code" >href="3rdparty_2libprocess_2include_2process_2pid_8hpp.html">process/pid.hpp</a>></span></div><div > class="line"><a name="l00023"></a><span class="lineno"> >23</span> <span class="preprocessor">#include <<a class="code" >href="libprocess_2include_2process_2process_8hpp.html">process/process.hpp</a>></span></div><div > class="line"><a name="l00024"></a><span class="lineno"> >24</span> </div><div class="line"><a name="l00025"></a><span >class="lineno"> 25</span>  <span class="keyword">namespace </span><a class="code" href="namespaceprocess.html">process</a> {</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">// Provides an asynchronous "loop" abstraction. This abstraction is</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// helpful for code that would have synchronously been written as a</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">// loop but asynchronously ends up being a recursive set of functions</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// which depending on the compiler may result in a stack overflow</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <s pan class="comment">// (i.e., a compiler that can't do sufficient tail call optimization</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// may add stack frames for each recursive call).</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">//</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// The loop abstraction takes an optional PID `pid` and uses it as the</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// execution context to run the loop. The implementation does a</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// `defer` on this `pid` to "pop" the stack when it needs to</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>& #160;<span class="comment">// asynchronously recurse. This also lets callers synchronize</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">// execution with other code dispatching and deferring using `pid`. If</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// `None` is passed for `pid` then no `defer` is done and the stack</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">// will still "pop" but be restarted from the execution context</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// wherever the blocked future is completed. This is usually very safe</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// when that blocked future will be completed by the IO thread, but</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// should not be used if it's completed by another process (because</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// you'll block that process until the next time the loop blocks).</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">//</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">// The two functions passed to the loop represent the loop "iterate"</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// step and the loop "body" step respectively. Each invocation of</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// "iterate&quo t; returns the next value and the "body" returns whether or</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">// not to continue looping (as well as any other processing necessary</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// of course). You can think of this synchronously as:</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">//</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">// bool condition = true;</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// do {</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">// condition = body(iterate());</span></div><div class="line"><a name="l00055"> </a><span class="lineno"> 55</span> <span class="comment">// } while (condition);</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">//</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">// Asynchronously using recursion this might look like:</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">//</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// Future<Nothing> loop()</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// {</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// return iterate()</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span cla ss="comment">// .then([](T t) {</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">// return body(t)</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">// .then([](bool condition) {</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">// if (condition) {</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">// return loop();</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">// } else {</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// return Nothing();</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span > <span class="comment">// }</span></div><div >class="line"><a name="l00070"></a><span class="lineno"> >70</span> <span class="comment">// });</span></div><div >class="line"><a name="l00071"></a><span class="lineno"> >71</span> <span class="comment">// });</span></div><div >class="line"><a name="l00072"></a><span class="lineno"> >72</span> <span class="comment">// }</span></div><div >class="line"><a name="l00073"></a><span class="lineno"> >73</span> <span class="comment">//</span></div><div class="line"><a >name="l00074"></a><span class="lineno"> 74</span> <span >class="comment">// And asynchronously using `pid` as the execution >context:</span></div><div class="line"><a name="l00075"></a><span >class="lineno"> 75</span> <span class="comment">//</span></div><div >class="line"><a name="l00076"></a><span class="lineno"> >76</span> <span class="comment">// Future<Nothing> >loop()</span></div><div cla ss="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">// {</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">// return iterate()</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">// .then(defer(pid, [](T t) {</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment">// return body(t)</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment">// .then(defer(pid, [](bool condition) {</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment">// if (condition) {</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment">// return loop();</span></di v><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">// } else {</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment">// return Nothing();</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment">// }</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment">// }));</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">// }));</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">// }</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment">//</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <sp an class="comment">// And now what this looks like using `loop`:</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">//</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">// loop(pid,</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// []() {</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">// return iterate();</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// },</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">// [](T t) {</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// return body(t);</span></di v><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment">// });</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">//</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// One difference between the `loop` version of the "body" versus the</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// other non-loop examples above is the return value is not `bool` or</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">// `Future<bool>` but rather `ControlFlow<V>` or</span></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// `Future<ControlFlow<V>>`. This enables you to return values out of</span></div><div class= "line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment">// the loop via a `Break(...)`, for example:</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment">//</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment">// loop(pid,</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment">// []() {</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">// return iterate();</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment">// },</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment">// [](T t) {</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span > <span class="comment">// if (finished(t)) {</span></div><div >class="line"><a name="l00113"></a><span class="lineno"> >113</span> <span class="comment">// return >Break(SomeValue());</span></div><div class="line"><a name="l00114"></a><span >class="lineno"> 114</span> <span class="comment">// >}</span></div><div class="line"><a name="l00115"></a><span class="lineno"> >115</span> <span class="comment">// return >Continue();</span></div><div class="line"><a name="l00116"></a><span >class="lineno"> 116</span> <span class="comment">// >});</span></div><div class="line"><a name="l00117"></a><span class="lineno"> >117</span> <span class="keyword">template</span> <<span >class="keyword">typename</span> Iterate,</div><div class="line"><a >name="l00118"></a><span class="lineno"> 118</span>  <span >class="keyword">typename</span> Body,</div><div class="line"><a >name="l00119"></a><span class="lineno "> 119</span>  <span class="keyword">typename</span> T = <span class="keyword">typename</span> <a class="code" href="structprocess_1_1internal_1_1unwrap.html#a42055ebfe5f79c5139c8811f9866cce9">internal::unwrap<typename result_of<Iterate()>::type</a>><a class="code" href="namespacemesos_1_1internal_1_1fs.html#a2343e2642db514496ba8380776487fba">::type</a>, <span class="comment">// NOLINT(whitespace/line_length)</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">typename</span> CF = <span class="keyword">typename</span> <a class="code" href="structprocess_1_1internal_1_1unwrap.html#a42055ebfe5f79c5139c8811f9866cce9">internal::unwrap<typename result_of<Body(T)>::type</a>><a class="code" href="namespacemesos_1_1internal_1_1fs.html#a2343e2642db514496ba8380776487fba">::type</a>, <span class="comment">// NOLINT(whitespace/line_length)</span></div><div class="line"><a name="l00121">< /a><span class="lineno"> 121</span>  <span class="keyword">typename</span> V = <span class="keyword">typename</span> CF::ValueType></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> Future<V> <a class="code" href="namespaceprocess.html#a59c192ee8ea5abbbee1642957f47c92a">loop</a>(<span class="keyword">const</span> <a class="code" href="classOption.html">Option<UPID></a>& pid, Iterate&& iterate, Body&& body);</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </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> <span class="comment">// A helper for `loop` which creates a Process for us to provide an</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// execution context for running the loop.</span>< /div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterate,</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">typename</span> Body,</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">typename</span> T = <span class="keyword">typename</span> <a class="code" href="structprocess_1_1internal_1_1unwrap.html#a42055ebfe5f79c5139c8811f9866cce9">internal::unwrap<typename result_of<Iterate()>::type</a>><a class="code" href="namespacemesos_1_1internal_1_1fs.html#a2343e2642db514496ba8380776487fba">::type</a>, <span class="comment">// NOLINT(whitespace/line_length)</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">typename</span> CF = <span class="keyword">typename</span> <a c lass="code" href="structprocess_1_1internal_1_1unwrap.html#a42055ebfe5f79c5139c8811f9866cce9">internal::unwrap<typename result_of<Body(T)>::type</a>><a class="code" href="namespacemesos_1_1internal_1_1fs.html#a2343e2642db514496ba8380776487fba">::type</a>, <span class="comment">// NOLINT(whitespace/line_length)</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keyword">typename</span> V = <span class="keyword">typename</span> CF::ValueType></div><div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="namespaceprocess.html#af4f4d3422eed6d82ea5af4a1a6e839a4"> 132</a></span> <a class="code" href="classprocess_1_1Future.html">Future<V></a> <a class="code" href="namespaceprocess.html#a59c192ee8ea5abbbee1642957f47c92a">loop</a>(Iterate&& iterate, Body&& body)</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>  <span class="comment">// Have libprocess own and free the new `ProcessBase`.</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <a class="code" href="structprocess_1_1UPID.html">UPID</a> <a class="code" href="namespaceprocess.html">process</a> = <a class="code" href="namespaceprocess.html#aff22904a83567125d3b4d0d88e5a2270">spawn</a>(<span class="keyword">new</span> <a class="code" href="classprocess_1_1ProcessBase.html">ProcessBase</a>(), <span class="keyword">true</span>);</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>  <span class="keywordflow">return</span> loop<Iterate, Body, T, CF, V>(</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <a class="code" href="namespaceos.html#ae19e4161a51b86a1f330f3bf1dc75389"> process</a>,</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  std::forward<Iterate>(iterate),</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  std::forward<Body>(body))</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  .onAny([=]() {</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <a class="code" href="namespaceprocess.html#a20443908afa3212215166e26065349e5">terminate</a>(process);</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">// NOTE: no need to `wait` or `delete` since the `spawn` above</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="comment">// put libprocess in control of garbage collection.</span></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> }</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> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment">// Generic "control flow" construct that is leveraged by</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment">// implementations such as `loop`. At a high-level a `ControlFlow`</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment">// represents some control flow statement such as `continue` or</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment">// `break`, however, these statements can both have values or be</span></div><div class="line"><a name="l 00153"></a><span class="lineno"> 153</span> <span class="comment">// value-less (i.e., these are meant to be composed "functionally" so</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment">// the representation of `break` captures a value that "exits the</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment">// current function" but the representation of `continue` does not).</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment">//</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment">// The pattern here is to define the type/representation of control</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment">// flow statements within the `ControlFlow` class (e.g.,</span></div> <div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment">// `ControlFlow::Continue` and `ControlFlow::Break`) but also provide</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">// "syntactic sugar" to make it easier to use at the call site (e.g.,</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment">// the functions `Continue()` and `Break(...)`).</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00163"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html"> 163</a></span> <span class="keyword">class </span><a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow</a></div><div class="line"><a name="l00164"></a><spa n class="lineno"> 164</span> {</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00166"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#a5ce1f085b8043fe8ac900ce9f63a0bde"> 166</a></span>  <span class="keyword">using</span> <a class="code" href="classprocess_1_1ControlFlow.html#a5ce1f085b8043fe8ac900ce9f63a0bde">ValueType</a> = T;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> </div><div class="line"><a name="l00168"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794b"> 168</a></span>  <span class="keyword">enum class</span> <a class="code" href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794b">Statement</a></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>  <a class="code" href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794ba2f453cfe638e57e27bb0c9512436111e">CONTINUE</a>,</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794ba14d6a3e0201f58bfe7c01e775973e80e">BREAK</a></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  };</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> </div><div class="line"><a name="l00174"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow_1_1Continue.html"> 174</a></span>  <span class="keyword">class </span><a class="code" href="classprocess_1_1ControlFlow_1_1Continue.html">Continue</a></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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <a class="code" href="classprocess_1_1ControlFlow_1_1Continue.html">Continue</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> U></div><div class="line"><a name="l00180"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow_1_1Continue.html#a8e1e336f8fa06958501963292a31164f"> 180</a></span>  <span class="keyword">operator</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U></a>() <span class="keyword">const</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="keywordflow">return</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U></a>(<a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U>::Statement::CONTINUE</a>, <a class="code" href="structNone.html">None</a>());</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  }</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  };</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div><div class="line"><a name="l00186"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow_1_1Break.html"> 186</a></span>  <span class="keyword">class </span><a class="code" href="classprocess_1_1ControlFlow_1_1Break.html">Break</a></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  {</div><div class="line"><a name ="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00189"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow_1_1Break.html#af7fb2876b55483e08e446e4206695eca"> 189</a></span>  <a class="code" href="classprocess_1_1ControlFlow_1_1Break.html#af7fb2876b55483e08e446e4206695eca">Break</a>(T t) : t(<a class="code" href="namespacestd.html">std</a>::move(t)) {}</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">template</span> <<span class="keyword">typename</span> U></div><div class="line"><a name="l00192"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow_1_1Break.html#ae47dc27fa4845951a7088286131686e0"> 192</a></span>  <span class="keyword">operator</span> <a class="code" href="classprocess_1_1ControlFlow. html">ControlFlow<U></a>() <span class="keyword">const</span> &</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  {</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">return</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U></a>(<a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U>::Statement::BREAK</a>, t);</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="keyword">template</span> <<span class="keyword">typename</span> U></div><div class="line"><a name="l00198"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow_1_1Break.html#afcbd83a411d73d75ba2fc300aa1b20f4"> 198</a>< /span>  <span class="keyword">operator</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U></a>() &&</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  {</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">return</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U></a>(<a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<U>::Statement::BREAK</a>, std::move(t));</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  T t;</div><div class="line"><a name="l00205"></a><sp an class="lineno"> 205</span>  };</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> </div><div class="line"><a name="l00207"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#ad8f5968ae93a1c00cfd67964c7895260"> 207</a></span>  <a class="code" href="classprocess_1_1ControlFlow.html#ad8f5968ae93a1c00cfd67964c7895260">ControlFlow</a>(<a class="code" href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794b">Statement</a> s, <a class="code" href="classOption.html">Option<T></a> t) : s(s), t(<a class="code" href="namespacestd.html">std</a>::move(t)) {}</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div><div class="line"><a name="l00209"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#a34752a25284d038dc5d4d9e551424cfe"> 209</a></span>  <a class="code" href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a57 7a794b">Statement</a> <a class="code" href="classprocess_1_1ControlFlow.html#a34752a25284d038dc5d4d9e551424cfe">statement</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> s; }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00211"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#a5c21809a15f9efe012e30d1a1cf05c3a"> 211</a></span>  T& <a class="code" href="classprocess_1_1ControlFlow.html#a5c21809a15f9efe012e30d1a1cf05c3a">value</a>() & { <span class="keywordflow">return</span> t.get(); }</div><div class="line"><a name="l00212"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#ad0fbad53169fc7766d61a69393ac14bc"> 212</a></span>  <span class="keyword">const</span> T& <a class="code" href="classprocess_1_1ControlFlow.html#ad0fbad53169fc7766d61a69393ac14bc">value</a>() const & { <span class="keywor dflow">return</span> t.get(); }</div><div class="line"><a name="l00213"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#a3a15eba61473df457b0ac4cbaddd21ed"> 213</a></span>  T&& <a class="code" href="classprocess_1_1ControlFlow.html#a3a15eba61473df457b0ac4cbaddd21ed">value</a>() && { <span class="keywordflow">return</span> t.get(); }</div><div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="classprocess_1_1ControlFlow.html#a9fa0744c29d7bffd54f10aea580ba187"> 214</a></span>  <span class="keyword">const</span> T&& <a class="code" href="classprocess_1_1ControlFlow.html#a9fa0744c29d7bffd54f10aea580ba187">value</a>() const && { <span class="keywordflow">return</span> t.get(); }</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> </div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="keyword">private</span>:</div> <div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <a class="code" href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794b">Statement</a> s;</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <a class="code" href="classOption.html">Option<T></a> t;</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> };</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> </div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment">// Provides "syntactic sugar" for creating a `ControlFlow::Continue`.</span></div><div class="line"><a name="l00223"></a><span class="lineno"><a class="line" href="structprocess_1_1Continue.html"> 223</a></span> <span class="keyword">struct </span><a class="code" href="structprocess_1_1 Continue.html">Continue</a></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> {</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <a class="code" href="structprocess_1_1Continue.html">Continue</a>() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> </div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00228"></a><span class="lineno"><a class="line" href="structprocess_1_1Continue.html#afa3c54c8941d6e85360a9ec8e26965ef"> 228</a></span>  <span class="keyword">operator</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<T></a>() <span class="keyword">const</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  {</div><div c lass="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">return</span> <span class="keyword">typename</span> <a class="code" href="classprocess_1_1ControlFlow_1_1Continue.html">ControlFlow<T>::Continue</a>();</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  }</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> </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="comment">// Provides "syntactic sugar" for creating a `ControlFlow::Break`.</span></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00237 "></a><span class="lineno"><a class="line" href="namespaceprocess.html#a4beae62da50c26c6cb8afd14e385d0c8"> 237</a></span> <span class="keyword">typename</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<typename std::decay<T>::type</a>><a class="code" href="namespaceprocess.html#a4beae62da50c26c6cb8afd14e385d0c8">::Break</a> <a class="code" href="namespaceprocess.html#a4beae62da50c26c6cb8afd14e385d0c8">Break</a>(T&& t)</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="keywordflow">return</span> <span class="keyword">typename</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<typename std::decay<T>::type</a>><a class="code" href="namespaceprocess.html#a4beae62da50c26c6cb8afd14e385d0c8">::Break</a>(</div><div class="line"><a name="l00240"></a><span class="lineno"> 240 </span>  std::forward<T>(t));</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> }</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> </div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div><div class="line"><a name="l00244"></a><span class="lineno"><a class="line" href="namespaceprocess.html#a7a61f12f614ea8c61821e61682c4bfb9"> 244</a></span> <span class="keyword">inline</span> <a class="code" href="classprocess_1_1ControlFlow_1_1Break.html">ControlFlow<Nothing>::Break</a> <a class="code" href="namespaceprocess.html#a4beae62da50c26c6cb8afd14e385d0c8">Break</a>()</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> {</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">return</span> <a class="code" href="namespaceprocess.html#a7a61f12f614ea8c61821e61682c4bfb9">ControlFlow&l t;Nothing>::Break</a>(<a class="code" href="structNothing.html">Nothing</a>());</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> }</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="keyword">namespace </span><a class="code" href="namespaceinternal.html">internal</a> {</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Iterate, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> T, <span class="keyword">typename</span> R></div><div class="line"><a name="l00253"></a><span class="lineno"><a class="line" href="classp rocess_1_1internal_1_1Loop.html"> 253</a></span> <span class="keyword">class </span><a class="code" href="classprocess_1_1internal_1_1Loop.html">Loop</a> : <span class="keyword">public</span> std::enable_shared_from_this<Loop<Iterate, Body, T, R>></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> <span class="keyword">public</span>:</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Iterate_, <span class="keyword">typename</span> Body_></div><div class="line"><a name="l00257"></a><span class="lineno"><a class="line" href="classprocess_1_1internal_1_1Loop.html#a4067cc276cd8152074a7094acf9ca451"> 257</a></span>  <span class="keyword">static</span> std::shared_ptr<Loop> <a class="code" href="classprocess_1_1internal_1_1Loop. html#a4067cc276cd8152074a7094acf9ca451">create</a>(</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option<UPID></a>& pid,</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  Iterate_&& iterate,</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  Body_&& body)</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  {</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">return</span> std::shared_ptr<Loop>(</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keyword">new</span> <a class="code" href="classprocess_1_1internal_1_1Loop.html">Loop</a>(</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  ; pid,</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  std::forward<Iterate_>(iterate),</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  std::forward<Body_>(body)));</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> </div><div class="line"><a name="l00269"></a><span class="lineno"><a class="line" href="classprocess_1_1internal_1_1Loop.html#a9923c05dd6d27f9ec0c61d28a5387641"> 269</a></span>  std::shared_ptr<Loop> <a class="code" href="classprocess_1_1internal_1_1Loop.html#a9923c05dd6d27f9ec0c61d28a5387641">shared</a>()</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>  <span class="comment">// Must fully specify `share d_from_this` because we're templated.</span></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">return</span> std::enable_shared_from_this<Loop>::shared_from_this();</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class="line"><a name="l00275"></a><span class="lineno"><a class="line" href="classprocess_1_1internal_1_1Loop.html#a39870dcf4e2432a29569a658ec0e33be"> 275</a></span>  std::weak_ptr<Loop> <a class="code" href="classprocess_1_1internal_1_1Loop.html#a39870dcf4e2432a29569a658ec0e33be">weak</a>()</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="keywordflow">return</span> std::weak_ptr<Loop>(shared());</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> </div><div class="line"><a name="l00280"></a><span class="lineno"><a class="line" href="classprocess_1_1internal_1_1Loop.html#a4743d5b323d0d9923cd83fd1abeda9c3"> 280</a></span>  <a class="code" href="classprocess_1_1Future.html">Future<R></a> <a class="code" href="classprocess_1_1internal_1_1Loop.html#a4743d5b323d0d9923cd83fd1abeda9c3">start</a>()</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>  <span class="keyword">auto</span> <span class="keyword">self</span> = shared();</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keyword">auto</span> weak_self = weak();</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> </div>< div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="comment">// Propagating discards:</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="comment">//</span></div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="comment">// When the caller does a discard we need to propagate it to</span></div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="comment">// either the future returned from `iterate` or the future</span></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// returned from `body`. One easy way to do this would be to add</span></div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// an `onAny` callback for every future returned from `iterate`</span></div><div class="line"><a name ="l00291"></a><span class="lineno"> 291</span>  <span class="comment">// and `body`, but that would be a slow memory leak that would</span></div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="comment">// grow over time, especially if the loop was actually</span></div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="comment">// infinite. Instead, we capture the current future that needs to</span></div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="comment">// be discarded within a `discard` function that we'll invoke when</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="comment">// we get a discard. Because there is a race setting the `discard`</span></div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="comment">// function and reading it out to invoke we have to synchronize</span></div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="comment">// access using a mutex. An alternative strategy would be to use</span></div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="comment">// something like `atomic_load` and `atomic_store` with</span></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="comment">// `shared_ptr` so that we can swap the current future(s)</span></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="comment">// atomically.</span></div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.future().onDiscard([weak_self]() {</div><div class="line"><a name="l00302"></ a><span class="lineno"> 302</span>  <span class="keyword">auto</span> <span class="keyword">self</span> = weak_self.lock();</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">if</span> (<span class="keyword">self</span>) {</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="comment">// We need to make a copy of the current `discard` function so</span></div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="comment">// that we can invoke it outside of the `synchronized` block</span></div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="comment">// in the event that discarding invokes causes the `onAny`</span></div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">// callbacks that we have added in `run` to execute which may</span></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="comment">// deadlock attempting to re-acquire `mutex`!</span></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  std::function<void()> <a class="code" href="namespaceprocess.html#a62d5333e8ec1817c249cf83e15d568b4">f</a> = []() {};</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keyword">synchronized</span> (<span class="keyword">self</span>->mutex) {</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  f = <span class="keyword">self</span>->discard;</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  }</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <a class="code" href="namespaceprocess.html#a62d5333e8ec1817c249cf83e15d568b4">f< /a>();</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  });</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">if</span> (pid.isSome()) {</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="comment">// Start the loop using `pid` as the execution context.</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <a class="code" href="namespaceprocess.html#acfbc29404bc653268289691b0dd59e22">dispatch</a>(pid.get(), [<span class="keyword">self</span>]() {</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keyword">self</span>->run(self->iterate());</div><div class="line">< a name="l00321"></a><span class="lineno"> 321</span>  });</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="comment">// TODO(benh): Link with `pid` so that we can discard or abandon</span></div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="comment">// the promise in the event `pid` terminates and didn't discard</span></div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="comment">// us so that we can avoid any leaks (memory or otherwise).</span></div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <a class="code" href="namespaceprocess.html#a72c24f06ac3f91b9412de80c6252df25"> run</a>(iterate());</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  }</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">return</span> <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.future();</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  }</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> </div><div class="line"><a name="l00333"></a><span class="lineno"><a class="line" href="classprocess_1_1internal_1_1Loop.html#a11417f29be6ae721ee9331b0ccbf16e4"> 333</a></span>  <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1internal_1_1Loop.html#a11417f29be6ae721ee9331b0ccbf16e4">run</a>(<a class="code" href="classprocess_1_1Future.html"> Future<T></a> next)</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  {</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keyword">auto</span> <span class="keyword">self</span> = shared();</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span> </div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  <span class="comment">// Reset `discard` so that we're not delaying cleanup of any</span></div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="comment">// captured futures longer than necessary.</span></div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="comment">//</span></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="comment">// TODO(benh): Use `WeakFuture` in `discard` functions instead.</ span></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keyword">synchronized</span> (mutex) {</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <a class="code" href="namespaceprocess.html#adc504b79a0e7ec7c4caa088a937d4feb">discard</a> = []() {};</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  }</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">while</span> (next.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>()) {</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <a class="code" href="classprocess_1_1Future.html">Future<ControlFlow<R></a>> flow = body(next.<a class="code" href="classprocess_1_1Future.html#aa78977d 3b585a5f5ccd682c1e9e2ddc4">get</a>());</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">if</span> (flow.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>()) {</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  <span class="keywordflow">switch</span> (flow->statement()) {</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">case</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<R>::Statement::CONTINUE</a>: {</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  next = iterate();</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  ; }</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="keywordflow">case</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<R>::Statement::BREAK</a>: {</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.set(flow->value());</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  }</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  }</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00359"></a><span class="l ineno"> 359</span>  <span class="keyword">auto</span> continuation = [<span class="keyword">self</span>](<span class="keyword">const</span> <a class="code" href="classprocess_1_1Future.html">Future<ControlFlow<R></a>>& flow) {</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span> (flow.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>()) {</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">switch</span> (flow->statement()) {</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keywordflow">case</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<R>::Statement::CONTINUE</a>: {</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keyword">self</span>->run(self->iterate());</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  }</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">case</span> <a class="code" href="classprocess_1_1ControlFlow.html">ControlFlow<R>::Statement::BREAK</a>: {</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keyword">self</span>->promise.set(flow->value());</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  }</div><div class="line"><a name="l00370"></a><span class="l ineno"> 370</span>  }</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (flow.<a class="code" href="classprocess_1_1Future.html#a493227e57f8848e37777b89c0f81e2ec">isFailed</a>()) {</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keyword">self</span>->promise.fail(flow.<a class="code" href="classprocess_1_1Future.html#ae649c56b07f44c05e4b7aa3620133ff9">failure</a>());</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (flow.<a class="code" href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">isDiscarded</a>()) {</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keyword">self</span>->promise.discar d();</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  }</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  };</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span> </div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">if</span> (pid.isSome()) {</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  flow.<a class="code" href="classprocess_1_1Future.html#a71bde220aed3c725cef2040f63adf42a">onAny</a>(<a class="code" href="namespaceprocess.html#a8b27a2ef76eb133bf0ce7a5eea4fb77c">defer</a>(pid.get(), continuation));</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  flow.<a class="code" href="classprocess_ 1_1Future.html#a71bde220aed3c725cef2040f63adf42a">onAny</a>(continuation);</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  }</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">if</span> (!<a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.future().hasDiscard()) {</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keyword">synchronized</span> (mutex) {</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <span class="keyword">self</span>->discard = [=]() <span class="keyword">mutable</span> { flow.<a class="code" href="classprocess_1_1Future.html#a4012f3faa6191fc13874dca62c14ced0">discard</a>(); };</div><div class="line"><a name ="l00387"></a><span class="lineno"> 387</span>  }</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  }</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> </div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="comment">// There's a race between when a discard occurs and the</span></div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="comment">// `discard` function gets invoked and therefore we must</span></div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="comment">// explicitly always do a discard. In addition, after a</span></div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="comment">// discard occurs we'll need to explicitly do discards for</span></div><div class="line"><a name="l00394" ></a><span class="lineno"> 394</span>  <span class="comment">// >each new future that blocks.</span></div><div class="line"><a >name="l00395"></a><span class="lineno"> 395</span>  <span >class="keywordflow">if</span> (<a class="code" >href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.future().hasDiscard()) > {</div><div class="line"><a name="l00396"></a><span class="lineno"> >396</span>  flow.<a class="code" >href="classprocess_1_1Future.html#a4012f3faa6191fc13874dca62c14ced0">discard</a>();</div><div > class="line"><a name="l00397"></a><span class="lineno"> 397</span>  > }</div><div class="line"><a name="l00398"></a><span class="lineno"> >398</span> </div><div class="line"><a name="l00399"></a><span >class="lineno"> 399</span>  <span >class="keywordflow">return</span>;</div><div class="line"><a >name="l00400"></a><span class="lineno"> 400</span>  }</div><div cla ss="line"><a name="l00401"></a><span class="lineno"> 401</span>  }</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keyword">auto</span> continuation = [<span class="keyword">self</span>](<span class="keyword">const</span> <a class="code" href="classprocess_1_1Future.html">Future<T></a>& next) {</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">if</span> (next.<a class="code" href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">isReady</a>()) {</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keyword">self</span>->run(next);</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (next.<a class="code" href="classprocess_1_1Future.html#a493227e57f8848e37777b89c0f81e2ec">isFailed</a>()) {</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <span class="keyword">self</span>->promise.fail(next.<a class="code" href="classprocess_1_1Future.html#ae649c56b07f44c05e4b7aa3620133ff9">failure</a>());</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (next.<a class="code" href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">isDiscarded</a>()) {</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keyword">self</span>->promise.discard();</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  };</div><div class="line"><a name="l00412"></ a><span class="lineno"> 412</span> </div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">if</span> (pid.isSome()) {</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  next.<a class="code" href="classprocess_1_1Future.html#a71bde220aed3c725cef2040f63adf42a">onAny</a>(<a class="code" href="namespaceprocess.html#a8b27a2ef76eb133bf0ce7a5eea4fb77c">defer</a>(pid.get(), continuation));</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  next.<a class="code" href="classprocess_1_1Future.html#a71bde220aed3c725cef2040f63adf42a">onAny</a>(continuation);</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  }</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span> </div ><div class="line"><a name="l00419"></a><span class="lineno"> >419</span>  <span class="keywordflow">if</span> (!<a class="code" >href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.future().hasDiscard()) > {</div><div class="line"><a name="l00420"></a><span class="lineno"> >420</span>  <span class="keyword">synchronized</span> (mutex) >{</div><div class="line"><a name="l00421"></a><span class="lineno"> >421</span>  <a class="code" >href="namespaceprocess.html#adc504b79a0e7ec7c4caa088a937d4feb">discard</a> = >[=]() <span class="keyword">mutable</span> { next.<a class="code" >href="classprocess_1_1Future.html#a4012f3faa6191fc13874dca62c14ced0">discard</a>(); > };</div><div class="line"><a name="l00422"></a><span class="lineno"> >422</span>  }</div><div class="line"><a name="l00423"></a><span >class="lineno"> 423</span>  }</div><div class="line"><a >name="l00424"></a><span class="lineno"> 424</s pan> </div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="comment">// See comment above as to why we need to explicitly discard</span></div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="comment">// regardless of the path the if statement took above.</span></div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  <span class="keywordflow">if</span> (<a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>.future().hasDiscard()) {</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  next.<a class="code" href="classprocess_1_1Future.html#a4012f3faa6191fc13874dca62c14ced0">discard</a>();</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  } </div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span> </div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00433"></a><span class="lineno"><a class="line" href="classprocess_1_1internal_1_1Loop.html#a077dc66e82c758d8b82dda11fc530d72"> 433</a></span>  <a class="code" href="classprocess_1_1internal_1_1Loop.html#a077dc66e82c758d8b82dda11fc530d72">Loop</a>(<span class="keyword">const</span> <a class="code" href="classOption.html">Option<UPID></a>& pid, <span class="keyword">const</span> Iterate& iterate, <span class="keyword">const</span> Body& body)</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  : pid(pid), iterate(iterate), body(body) {}</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span> </div><div class="line"><a name="l00436"></a><span class="lineno"><a cl ass="line" href="classprocess_1_1internal_1_1Loop.html#a0c7b83e40e88e5d40ad29802be101dfd"> 436</a></span>  <a class="code" href="classprocess_1_1internal_1_1Loop.html#a0c7b83e40e88e5d40ad29802be101dfd">Loop</a>(<span class="keyword">const</span> <a class="code" href="classOption.html">Option<UPID></a>& pid, Iterate&& iterate, Body&& body)</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  : pid(pid), iterate(<a class="code" href="namespacestd.html">std</a>::move(iterate)), body(<a class="code" href="namespacestd.html">std</a>::move(body)) {}</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> </div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <span class="keyword">const</span> <a class="code" href="classOption.html">Option<UPID& gt;</a> pid;</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  Iterate iterate;</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  Body body;</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <a class="code" href="classprocess_1_1Promise.html">Promise<R></a> <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>;</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span> </div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="comment">// In order to discard the loop safely we capture the future that</span></div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="comment">// needs to be discarded within the `discard` function and reading</span></div><div class="line"><a name="l00447"></a><span class="linen o"> 447</span>  <span class="comment">// and writing that function with a mutex.</span></div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  std::mutex mutex;</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  std::function<void()> <a class="code" href="namespaceprocess.html#adc504b79a0e7ec7c4caa088a937d4feb">discard</a> = []() {};</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span> };</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span> </div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span> } <span class="comment">// namespace internal {</span></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span> </div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span> <span class="keyword">tem plate</span> <<span class="keyword">typename</span> Iterate, <span class="keyword">typename</span> Body, <span class="keyword">typename</span> T, <span class="keyword">typename</span> CF, <span class="keyword">typename</span> V></div><div class="line"><a name="l00456"></a><span class="lineno"><a class="line" href="namespaceprocess.html#a852052836f10e7c11a19320e846d472e"> 456</a></span> <a class="code" href="classprocess_1_1Future.html">Future<V></a> <a class="code" href="namespaceprocess.html#a59c192ee8ea5abbbee1642957f47c92a">loop</a>(<span class="keyword">const</span> <a class="code" href="classOption.html">Option<UPID></a>& pid, Iterate&& iterate, Body&& body)</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span> {</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  <span class="keyword">using</span> Loop = <a class="code" href="classprocess_1_1internal_1_1Loop.html">internal ::Loop</a><</div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keyword">typename</span> <a class="code" href="namespacemesos_1_1internal_1_1fs.html#a2343e2642db514496ba8380776487fba">std::decay<Iterate>::type</a>,</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keyword">typename</span> <a class="code" href="namespacemesos_1_1internal_1_1fs.html#a2343e2642db514496ba8380776487fba">std::decay<Body>::type</a>,</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  T,</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  V>;</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> </div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  std::shared_ptr<Loop> <a class="code" href="namespaceprocess.html#a59c192ee8ea5abbbee1642957f47c92a">loop</a> = <a class="code" href="namespacecgroups.html#a2ecc89636706df947027a4c3c2100fbe">Loop::create</a>(</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  pid,</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  std::forward<Iterate>(iterate),</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  std::forward<Body>(body));</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> </div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keywordflow">return</span> loop->start();</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> }</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span> </div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span> } <span class="comment">// namespace process {</span></div><div class="line">< a name="l00473"></a><span class="lineno"> 473</span> </div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span> <span class="preprocessor">#endif // __PROCESS_LOOP_HPP__</span></div><div class="ttc" id="classprocess_1_1ControlFlow_html_ad8f5968ae93a1c00cfd67964c7895260"><div class="ttname"><a href="classprocess_1_1ControlFlow.html#ad8f5968ae93a1c00cfd67964c7895260">process::ControlFlow::ControlFlow</a></div><div class="ttdeci">ControlFlow(Statement s, Option< T > t)</div><div class="ttdef"><b>Definition:</b> loop.hpp:207</div></div> -<div class="ttc" id="classprocess_1_1Future_html_a68f241961e700d0cecf982d9cc0043d7"><div class="ttname"><a href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">process::Future::isReady</a></div><div class="ttdeci">bool isReady() const </div><div class="ttdef"><b>Definition:</b> future.hpp:1220</div></div> +<div class="ttc" id="classprocess_1_1Future_html_a68f241961e700d0cecf982d9cc0043d7"><div class="ttname"><a href="classprocess_1_1Future.html#a68f241961e700d0cecf982d9cc0043d7">process::Future::isReady</a></div><div class="ttdeci">bool isReady() const </div><div class="ttdef"><b>Definition:</b> future.hpp:1227</div></div> <div class="ttc" id="classprocess_1_1internal_1_1Loop_html"><div class="ttname"><a href="classprocess_1_1internal_1_1Loop.html">process::internal::Loop</a></div><div class="ttdef"><b>Definition:</b> loop.hpp:253</div></div> <div class="ttc" id="structNothing_html"><div class="ttname"><a href="structNothing.html">Nothing</a></div><div class="ttdef"><b>Definition:</b> nothing.hpp:16</div></div> <div class="ttc" id="classprocess_1_1ControlFlow_html_af212ef291f73ba2e7b37586a577a794ba14d6a3e0201f58bfe7c01e775973e80e"><div class="ttname"><a href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794ba14d6a3e0201f58bfe7c01e775973e80e">process::ControlFlow::Statement::BREAK</a></div></div> <div class="ttc" id="classOption_html"><div class="ttname"><a href="classOption.html">Option</a></div><div class="ttdef"><b>Definition:</b> option.hpp:28</div></div> <div class="ttc" id="namespaceprocess_html_a62d5333e8ec1817c249cf83e15d568b4"><div class="ttname"><a href="namespaceprocess.html#a62d5333e8ec1817c249cf83e15d568b4">process::f</a></div><div class="ttdeci">F && f</div><div class="ttdef"><b>Definition:</b> defer.hpp:270</div></div> <div class="ttc" id="classprocess_1_1internal_1_1Loop_html_a4067cc276cd8152074a7094acf9ca451"><div class="ttname"><a href="classprocess_1_1internal_1_1Loop.html#a4067cc276cd8152074a7094acf9ca451">process::internal::Loop::create</a></div><div class="ttdeci">static std::shared_ptr< Loop > create(const Option< UPID > &pid, Iterate_ &&iterate, Body_ &&body)</div><div class="ttdef"><b>Definition:</b> loop.hpp:257</div></div> -<div class="ttc" id="classprocess_1_1Future_html_aa78977d3b585a5f5ccd682c1e9e2ddc4"><div class="ttname"><a href="classprocess_1_1Future.html#aa78977d3b585a5f5ccd682c1e9e2ddc4">process::Future::get</a></div><div class="ttdeci">const T & get() const </div><div class="ttdef"><b>Definition:</b> future.hpp:1299</div></div> -<div class="ttc" id="structprocess_1_1internal_1_1unwrap_html_a42055ebfe5f79c5139c8811f9866cce9"><div class="ttname"><a href="structprocess_1_1internal_1_1unwrap.html#a42055ebfe5f79c5139c8811f9866cce9">process::internal::unwrap::type</a></div><div class="ttdeci">T type</div><div class="ttdef"><b>Definition:</b> future.hpp:939</div></div> +<div class="ttc" id="classprocess_1_1Future_html_aa78977d3b585a5f5ccd682c1e9e2ddc4"><div class="ttname"><a href="classprocess_1_1Future.html#aa78977d3b585a5f5ccd682c1e9e2ddc4">process::Future::get</a></div><div class="ttdeci">const T & get() const </div><div class="ttdef"><b>Definition:</b> future.hpp:1306</div></div> +<div class="ttc" id="structprocess_1_1internal_1_1unwrap_html_a42055ebfe5f79c5139c8811f9866cce9"><div class="ttname"><a href="structprocess_1_1internal_1_1unwrap.html#a42055ebfe5f79c5139c8811f9866cce9">process::internal::unwrap::type</a></div><div class="ttdeci">T type</div><div class="ttdef"><b>Definition:</b> future.hpp:942</div></div> <div class="ttc" id="namespaceprocess_html_a4beae62da50c26c6cb8afd14e385d0c8"><div class="ttname"><a href="namespaceprocess.html#a4beae62da50c26c6cb8afd14e385d0c8">process::Break</a></div><div class="ttdeci">ControlFlow< typename std::decay< T >::type >::Break Break(T &&t)</div><div class="ttdef"><b>Definition:</b> loop.hpp:237</div></div> <div class="ttc" id="classprocess_1_1ControlFlow_html_a34752a25284d038dc5d4d9e551424cfe"><div class="ttname"><a href="classprocess_1_1ControlFlow.html#a34752a25284d038dc5d4d9e551424cfe">process::ControlFlow::statement</a></div><div class="ttdeci">Statement statement() const </div><div class="ttdef"><b>Definition:</b> loop.hpp:209</div></div> <div class="ttc" id="classprocess_1_1internal_1_1Loop_html_a39870dcf4e2432a29569a658ec0e33be"><div class="ttname"><a href="classprocess_1_1internal_1_1Loop.html#a39870dcf4e2432a29569a658ec0e33be">process::internal::Loop::weak</a></div><div class="ttdeci">std::weak_ptr< Loop > weak()</div><div class="ttdef"><b>Definition:</b> loop.hpp:275</div></div> <div class="ttc" id="namespacestd_html"><div class="ttname"><a href="namespacestd.html">std</a></div><div class="ttdef"><b>Definition:</b> type_utils.hpp:510</div></div> <div class="ttc" id="classprocess_1_1ControlFlow_html_af212ef291f73ba2e7b37586a577a794b"><div class="ttname"><a href="classprocess_1_1ControlFlow.html#af212ef291f73ba2e7b37586a577a794b">process::ControlFlow::Statement</a></div><div class="ttdeci">Statement</div><div class="ttdef"><b>Definition:</b> loop.hpp:168</div></div> <div class="ttc" id="classprocess_1_1ProcessBase_html"><div class="ttname"><a href="classprocess_1_1ProcessBase.html">process::ProcessBase</a></div><div class="ttdef"><b>Definition:</b> process.hpp:72</div></div> -<div class="ttc" id="classprocess_1_1Future_html_a4012f3faa6191fc13874dca62c14ced0"><div class="ttname"><a href="classprocess_1_1Future.html#a4012f3faa6191fc13874dca62c14ced0">process::Future::discard</a></div><div class="ttdeci">bool discard()</div><div class="ttdef"><b>Definition:</b> future.hpp:1162</div></div> +<div class="ttc" id="classprocess_1_1Future_html_a4012f3faa6191fc13874dca62c14ced0"><div class="ttname"><a href="classprocess_1_1Future.html#a4012f3faa6191fc13874dca62c14ced0">process::Future::discard</a></div><div class="ttdeci">bool discard()</div><div class="ttdef"><b>Definition:</b> future.hpp:1169</div></div> <div class="ttc" id="classprocess_1_1ControlFlow_html_a5ce1f085b8043fe8ac900ce9f63a0bde"><div class="ttname"><a href="classprocess_1_1ControlFlow.html#a5ce1f085b8043fe8ac900ce9f63a0bde">process::ControlFlow::ValueType</a></div><div class="ttdeci">T ValueType</div><div class="ttdef"><b>Definition:</b> loop.hpp:166</div></div> <div class="ttc" id="dispatch_8hpp_html"><div class="ttname"><a href="dispatch_8hpp.html">dispatch.hpp</a></div></div> <div class="ttc" id="namespaceprocess_html_aff22904a83567125d3b4d0d88e5a2270"><div class="ttname"><a href="namespaceprocess.html#aff22904a83567125d3b4d0d88e5a2270">process::spawn</a></div><div class="ttdeci">UPID spawn(ProcessBase *process, bool manage=false)</div><div class="ttdoc">Spawn a new process. </div></div> <div class="ttc" id="namespaceprocess_html_a20443908afa3212215166e26065349e5"><div class="ttname"><a href="namespaceprocess.html#a20443908afa3212215166e26065349e5">process::terminate</a></div><div class="ttdeci">void terminate(const UPID &pid, bool inject=true)</div><div class="ttdoc">Sends a TerminateEvent to the given process. </div></div> <div class="ttc" id="namespaceprocess_html_a7a61f12f614ea8c61821e61682c4bfb9"><div class="ttname"><a href="namespaceprocess.html#a7a61f12f614ea8c61821e61682c4bfb9">process::Break</a></div><div class="ttdeci">ControlFlow< Nothing >::Break Break()</div><div class="ttdef"><b>Definition:</b> loop.hpp:244</div></div> <div class="ttc" id="namespaceprocess_html_acfbc29404bc653268289691b0dd59e22"><div class="ttname"><a href="namespaceprocess.html#acfbc29404bc653268289691b0dd59e22">process::dispatch</a></div><div class="ttdeci">void dispatch(const PID< T > &pid, void(T::*method)())</div><div class="ttdef"><b>Definition:</b> dispatch.hpp:174</div></div> -<div class="ttc" id="classprocess_1_1Future_html_abc89036db733a417b7b383b091efaf3c"><div class="ttname"><a href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">process::Future::isDiscarded</a></div><div class="ttdeci">bool isDiscarded() const </div><div class="ttdef"><b>Definition:</b> future.hpp:1227</div></div> +<div class="ttc" id="classprocess_1_1Future_html_abc89036db733a417b7b383b091efaf3c"><div class="ttname"><a href="classprocess_1_1Future.html#abc89036db733a417b7b383b091efaf3c">process::Future::isDiscarded</a></div><div class="ttdeci">bool isDiscarded() const </div><div class="ttdef"><b>Definition:</b> future.hpp:1234</div></div> <div class="ttc" id="structprocess_1_1UPID_html"><div class="ttname"><a href="structprocess_1_1UPID.html">process::UPID</a></div><div class="ttdoc">An "untyped" PID, used to encapsulate the process ID for lower-layer abstractions (eg...</div><div class="ttdef"><b>Definition:</b> pid.hpp:39</div></div> -<div class="ttc" id="classprocess_1_1Future_html_a71bde220aed3c725cef2040f63adf42a"><div class="ttname"><a href="classprocess_1_1Future.html#a71bde220aed3c725cef2040f63adf42a">process::Future::onAny</a></div><div class="ttdeci">const Future< T > & onAny(AnyCallback &&callback) const </div><div class="ttdef"><b>Definition:</b> future.hpp:1447</div></div> +<div class="ttc" id="classprocess_1_1Future_html_a71bde220aed3c725cef2040f63adf42a"><div class="ttname"><a href="classprocess_1_1Future.html#a71bde220aed3c725cef2040f63adf42a">process::Future::onAny</a></div><div class="ttdeci">const Future< T > & onAny(AnyCallback &&callback) const </div><div class="ttdef"><b>Definition:</b> future.hpp:1454</div></div> <div class="ttc" id="classprocess_1_1ControlFlow_html_ad0fbad53169fc7766d61a69393ac14bc"><div class="ttname"><a href="classprocess_1_1Contro
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