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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li><li class="navelem"><a class="el" href="dir_80f0d4a0945c74dfa611dba2ec326a39.html">slave</a></li> </ul>
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<div class="title">gc.hpp</div> </div>
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<a href="src_2slave_2gc_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>&#160;<span class="comment">// Licensed to the Apache Software Foundation (ASF) under one</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">// or more contributor license agreements. See the NOTICE file</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// distributed with this work for additional information</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment">// regarding copyright ownership. The ASF licenses this file</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment">// to you under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment">// &quot;License&quot;); you may not use this file except in compliance</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment">// with the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment">// See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment">// limitations under the License.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor">#ifndef __SLAVE_GC_HPP__</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define __SLAVE_GC_HPP__</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="future_8hpp.html">process/future.hpp</a>&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="id_8hpp.html">process/id.hpp</a>&gt;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="owned_8hpp.html">process/owned.hpp</a>&gt;</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="libprocess_2include_2process_2process_8hpp.html">process/process.hpp</a>&gt;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="timeout_8hpp.html">process/timeout.hpp</a>&gt;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="timer_8hpp.html">process/timer.hpp</a>&gt;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="duration_8hpp.html">stout/duration.hpp</a>&gt;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="hashmap_8hpp.html">stout/hashmap.hpp</a>&gt;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="multimap_8hpp.html">stout/multimap.hpp</a>&gt;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="nothing_8hpp.html">stout/nothing.hpp</a>&gt;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="try_8hpp.html">stout/try.hpp</a>&gt;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="keyword">namespace </span>mesos {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;<span class="keyword">namespace </span>slave {</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;<span class="comment">// Forward declarations.</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="keyword">class </span>GarbageCollectorProcess;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;<span class="comment">// Provides an abstraction for removing files and directories after</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;<span class="comment">// some point at which they are no longer considered necessary to keep</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="comment">// around. The intent with this abstraction is to also easily enable</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="comment">// implementations that may actually copy files and directories to</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;<span class="comment">// &quot;more&quot; permanent storage (or provide any other hooks that might be</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="comment">// useful, e.g., emailing users some time before their files are</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="comment">// scheduled for removal).</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="classmesos_1_1internal_1_1slave_1_1GarbageCollector.html"> 50</a></span>&#160;<span class="keyword">class </span><a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollector.html">GarbageCollector</a></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;{</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollector.html#a736496041f25974a73188c3c876ccb7f">GarbageCollector</a>();</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="keyword">virtual</span> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollector.html#a460483d154feced6c5e989f6f9ad1b8c">~GarbageCollector</a>();</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="comment">// Schedules the specified path for removal after the specified</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="comment">// duration of time has elapsed. If the path is already scheduled,</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="comment">// this will reschedule the removal operation, and induce a discard</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="comment">// on the previous future.</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="comment">// The future will become ready when the path has been removed.</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="comment">// The future will fail if the path did not exist, or on error.</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="comment">// The future will be discarded if the path was unscheduled, or</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="comment">// was rescheduled.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="comment">// Note that you currently cannot discard a returned future, instead</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="comment">// you must call unschedule.</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">virtual</span> <a class="code" href="classprocess_1_1Future.html">process::Future&lt;Nothing&gt;</a> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollector.html#ab1be3a7155eb026d306b907eb7b815ae">schedule</a>(</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keyword">const</span> <a class="code" href="classDuration.html">Duration</a>&amp; d,</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keyword">const</span> std::string&amp; path);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="comment">// Unschedules the specified path for removal.</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="comment">// The future will be true if the path has been unscheduled.</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; <span class="comment">// The future will be false if the path is not scheduled for</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="comment">// removal, or the path has already being removed.</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="comment">// Note that you currently cannot discard a returned future.</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keyword">virtual</span> <a class="code" href="classprocess_1_1Future.html">process::Future&lt;bool&gt;</a> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollector.html#a54ea92b50917572fb8ae5447040cc633">unschedule</a>(<span class="keyword">const</span> std::string&amp; path);</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; <span class="comment">// Deletes all the directories, whose scheduled garbage collection time</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="comment">// is within the next &#39;d&#39; duration of time.</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollector.html#aa0cd8028bc38e4cf966125bdaddf9231">prune</a>(<span class="keyword">const</span> <a class="code" href="classDuration.html">Duration</a>&amp; d);</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html">GarbageCollectorProcess</a>* process;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;};</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno"><a class="line" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html"> 86</a></span>&#160;<span class="keyword">class </span><a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html">GarbageCollectorProcess</a> :</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keyword">public</span> <a class="code" href="classprocess_1_1Process.html">process::Process</a>&lt;GarbageCollectorProcess&gt;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;{</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html#ae67d194bc55db9495437effd0fd7c486"> 90</a></span>&#160; <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html#ae67d194bc55db9495437effd0fd7c486">GarbageCollectorProcess</a>()</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; : <a class="code" href="classprocess_1_1ProcessBase.html#a318038bacd95e4260864533f7cfe12fd">ProcessBase</a>(<a class="code" href="namespaceos.html#ae19e4161a51b86a1f330f3bf1dc75389">process</a>::ID::<a class="code" href="namespaceprocess_1_1ID.html#aeb11a48c9def1da169d8455a30d0ee39">generate</a>(<span class="stringliteral">&quot;agent-garbage-collector&quot;</span>)) {}</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keyword">virtual</span> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html#ab94d34213b83855911bd4758debc920e">~GarbageCollectorProcess</a>();</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <a class="code" href="classprocess_1_1Future.html">process::Future&lt;Nothing&gt;</a> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html#a529cf999737a347ed985b02f1bdffc5a">schedule</a>(</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; <span class="keyword">const</span> <a class="code" href="classDuration.html">Duration</a>&amp; d,</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keyword">const</span> std::string&amp; path);</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html#a9e8670bb25e4f3e12e50d414faf7a073">unschedule</a>(<span class="keyword">const</span> std::string&amp; path);</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; <span class="keywordtype">void</span> <a class="code" href="classmesos_1_1internal_1_1slave_1_1GarbageCollectorProcess.html#a70df50e4c266551f3344e74a8081ff57">prune</a>(<span class="keyword">const</span> <a class="code" href="classDuration.html">Duration</a>&amp; d);</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keywordtype">void</span> reset();</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keywordtype">void</span> <span class="keyword">remove</span>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Timeout.html">process::Timeout</a>&amp; removalTime);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="keyword">struct </span>PathInfo</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; PathInfo(<span class="keyword">const</span> std::string&amp; _path,</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; <a class="code" href="classprocess_1_1Owned.html">process::Owned</a>&lt;<a class="code" href="classprocess_1_1Promise.html">process::Promise&lt;Nothing&gt;</a>&gt; _promise)</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; : path(_path), <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>(_promise) {}</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="namespacemesos_1_1internal_1_1slave.html#a9be31fa94f9a49c22650ce5e3a3954c0">operator==</a>(<span class="keyword">const</span> PathInfo&amp; that)<span class="keyword"> const</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;<span class="keyword"> </span>{</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="keywordflow">return</span> path == that.path &amp;&amp; <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a> == that.promise;</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; }</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; <span class="keyword">const</span> std::string path;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keyword">const</span> <a class="code" href="classprocess_1_1Owned.html">process::Owned&lt;process::Promise&lt;Nothing&gt;</a>&gt; <a class="code" href="namespacemesos_1_1internal_1_1log_1_1protocol.html#a3b1f8bd7b18c51af9d1f58842950b545">promise</a>;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; };</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; <span class="comment">// Store all the timeouts and corresponding paths to delete.</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="comment">// NOTE: We are using Multimap here instead of Multihashmap, because</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; <span class="comment">// we need the keys of the map (deletion time) to be sorted.</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <a class="code" href="classMultimap.html">Multimap&lt;process::Timeout, PathInfo&gt;</a> paths;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <span class="comment">// We also need efficient lookup for a path, to determine whether</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="comment">// it exists in our paths mapping.</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; <a class="code" href="classhashmap.html">hashmap&lt;std::string, process::Timeout&gt;</a> timeouts;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; <a class="code" href="classprocess_1_1Timer.html">process::Timer</a> timer;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160;};</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160;} <span class="comment">// namespace slave {</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160;} <span class="comment">// namespace internal {</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;} <span class="comment">// namespace mesos {</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;<span class="preprocessor">#endif // __SLAVE_GC_HPP__</span></div>
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<div class="ttc" id="classprocess_1_1Timeout_html"><div class="ttname"><a href="classprocess_1_1Timeout.html">process::Timeout</a></div><div class="ttdef"><b>Definition:</b> timeout.hpp:24</div></div>
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