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Posted to commits@mesos.apache.org by gi...@apache.org on 2018/06/11 14:11:52 UTC
[08/20] mesos-site git commit: Updated the website built from mesos
SHA: b1e88f7.
http://git-wip-us.apache.org/repos/asf/mesos-site/blob/0df7420a/content/api/latest/c++/sysctl_8hpp_source.html
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<div class="contents">
<a href="sysctl_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 __STOUT_OS_SYSCTL_HPP__</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#define __STOUT_OS_SYSCTL_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="comment">// Only provide sysctl support for OS X and FreeBSD.</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#if !defined(__APPLE__) && !defined(__FreeBSD__)</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#error "stout/os/sysctl.hpp is only available on OS X and FreeBSD."</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="prepro
cessor">#endif</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <sys/sysctl.h></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <sys/time.h></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <sys/types.h></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="preprocessor">#include <string></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </di
v><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <<a class="code" href="error_8hpp.html">stout/error.hpp</a>></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="none_8hpp.html">stout/none.hpp</a>></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="option_8hpp.html">stout/option.hpp</a>></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="strings_8hpp.html">stout/strings.hpp</a>></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="code" href="try_8hpp.html">stout/try.hpp</a>></span></div><div class="line"><a name="l00
033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">namespace </span><a class="code" href="namespaceos.html">os</a> {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// Provides an abstraction for getting system information via the</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">// underlying 'sysctl' system call. You describe the sysctl</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">// "Management Information Base" (MIB) name via the constructor, for</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// example, to describe "maximum n
umber of processes allowed in the</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">// system" you would do:</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">//</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// os::sysctl(CTL_KERN, KERN_MAXPROC)</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">//</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// To _retrieve_ the value you need to use one of the 'integer',</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// 'string', 'table', or 'time' methods to indicate the type of the</span></div><div class="line"><a name="l00046"></a
><span class="lineno"> 46</span> <span class="comment">// value being retrieved. For example:</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">//</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// Try<int> maxproc = os::sysctl(CTL_KERN, KERN_MAXPROC).integer();</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">//</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// Note that the 'table' method requires specifying a length. If you</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">// would like the length to be looked up dynamically you can just pass</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="com
ment">// None. Here's an example using 'table' that builds on above:</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">//</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">// Try<vector<kinfo_proc>> processes =</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">// os::sysctl(CTL_KERN, KERN_PROC, KERN_PROC_ALL).table(maxprox.get());</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">// TODO(benh): Provide an 'integer(i)', 'string(s)', and 'table(t)' to</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// enable sett
ing system information.</span></div><div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html"> 59</a></span> <span class="keyword">struct </span><a class="code" href="structos_1_1sysctl.html">sysctl</a></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> {</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// Note that we create a constructor for each number of levels</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// because we can't pick a suitable default for unused levels (in</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// order to distinguish no value from some value) and while Option</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="comment">// w
ould solve that it could also cause people to use None which</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// we'd need to later handle as an error.</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">explicit</span> <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(<span class="keywordtype">int</span> level1);</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(<span class="keywordtype">int</span> level1, <span class="keywordtype">int</span> level2);</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(<span class="keywordtype">int</span> level1, <span class="keywo
rdtype">int</span> level2, <span class="keywordtype">int</span> level3);</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(<span class="keywordtype">int</span> level1, <span class="keywordtype">int</span> level2, <span class="keywordtype">int</span> level3, <span class="keywordtype">int</span> level4);</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(<span class="keywordtype">int</span> level1, <span class="keywordtype">int</span> level2, <span class="keywordtype">int</span> level3, <span class="keywordtype">int</span> level4, <span class="keywordtype">int</span> level5);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="structos_1_1sysctl.html#a8bad8be3072cd46efeacdf4e9fc7c2b
8">~sysctl</a>();</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="comment">// Get system information as an integer.</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">private</span>: <span class="keyword">struct </span>Integer; <span class="comment">// Forward declaration.</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  Integer <a class="code" href="structos_1_1sysctl.html#ae4fa1e9a1934a5f694a83ba10b008764">integer</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span cl
ass="comment">// Get system information as a string.</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="classTry.html">Try<std::string></a> <a class="code" href="structos_1_1sysctl.html#af54897c91536ccd5d829daabbac64266">string</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">// Get system information as a timeval.</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <a class="code" href="classTry.html">Try<timeval></a> <a class="code" href="structos_1_1sysctl.html#aa0170ffd9e615f415e5cef7126831728">time</a>() <span class="keyword">const</span>;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno
"> 84</span>  <span class="comment">// Get system information as a table, optionally specifying a</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="comment">// length. Note that this function is lazy and will not actually</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">// perform the syscall until you cast (implicitly or explicitly) a</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// 'Table' to a std::vector<T>. For example, to get the first 10</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">// processes in the process table you can do:</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 clas
s="lineno"> 90</span>  <span class="comment">// Try<std::vector<kinfo_proc>> processes =</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// os::sysctl(CTL_KERN, KERN_PROC, KERN_PROC_ALL).table(10);</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="keyword">private</span>: <span class="keyword">struct </span>Table; <span class="comment">// Forward declaration.</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  Table <a class="code" href="structos_1_1sysctl.html#a519389727f9ecc76af96ed087fcff691">table</a>(<span class="keyword">const</span> <a class="code" href="cla
ssOption.html">Option<size_t></a>& length = <a class="code" href="structNone.html">None</a>()) <span class="keyword">const</span>;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">struct </span>Integer</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  {</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  Integer(<span class="keywordtype">int</span> _levels, <span class="keywordtype">int</span>* _name);</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">template</span> <<span class="keyword">typename</spa
n> T></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">operator</span> <a class="code" href="classTry.html">Try<T></a>();</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> levels;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordtype">int</span>* name;</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  };</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">struct </span>Table</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  {</div><div class="line"><a name="l00111
"></a><span class="lineno"> 111</span>  Table(<span class="keywordtype">int</span> _levels, <span class="keywordtype">int</span>* _name, <span class="keyword">const</span> <a class="code" href="classOption.html">Option<size_t></a>& _length);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">operator</span> <a class="code" href="classTry.html">Try<std::vector<T></a>>();</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> levels;</div><div class="line"><a n
ame="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">int</span>* name;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="classOption.html">Option<size_t></a> length;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  };</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> levels;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordtype">int</span>* name;</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> </div><div cla
ss="line"><a name="l00126"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40"> 126</a></span> <span class="keyword">inline</span> <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl::sysctl</a>(<span class="keywordtype">int</span> level1)</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  : levels(1), name(new int[levels])</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> {</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  name[0] = level1;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> }</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="structos_1_1s
ysctl.html#a86356cee57ee889e8353fc488a5e61a1"> 133</a></span> <span class="keyword">inline</span> <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl::sysctl</a>(<span class="keywordtype">int</span> level1, <span class="keywordtype">int</span> level2)</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  : levels(2), name(new int[levels])</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> {</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  name[0] = level1;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  name[1] = level2;</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> }</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"
></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#a3341cabf86d3585a12fb74000971a2e6"> 141</a></span> <span class="keyword">inline</span> <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl::sysctl</a>(<span class="keywordtype">int</span> level1, <span class="keywordtype">int</span> level2, <span class="keywordtype">int</span> level3)</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  : levels(3), name(new int[levels])</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> {</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  name[0] = level1;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  name[1] = level2;</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  name[2] = level3;</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> </div><div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#acce1acf3d6dfb33d4d06dfe2ee09169b"> 150</a></span> <span class="keyword">inline</span> <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl::sysctl</a>(<span class="keywordtype">int</span> level1, <span class="keywordtype">int</span> level2, <span class="keywordtype">int</span> level3, <span class="keywordtype">int</span> level4)</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  : levels(4), name(new int[levels])</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> {</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  name[0] = level1;</div><div class="line"><a name="l00
154"></a><span class="lineno"> 154</span>  name[1] = level2;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  name[2] = level3;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  name[3] = level4;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> }</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div><div class="line"><a name="l00160"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#aae16684fca2b68f7ae4c998cee5f6f7e"> 160</a></span> <span class="keyword">inline</span> <a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl::sysctl</a>(</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordtype">int</span> level1,</div><div class="line"><a name="l
00162"></a><span class="lineno"> 162</span>  <span class="keywordtype">int</span> level2,</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">int</span> level3,</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">int</span> level4,</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordtype">int</span> level5)</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  : levels(5), name(new int[levels])</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  name[0] = level1;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  name[1] = level2;</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  name[2
] = level3;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  name[3] = level4;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  name[4] = level5;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> }</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> </div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div><div class="line"><a name="l00176"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#a8bad8be3072cd46efeacdf4e9fc7c2b8"> 176</a></span> <span class="keyword">inline</span> <a class="code" href="structos_1_1sysctl.html#a8bad8be3072cd46efeacdf4e9fc7c2b8">sysctl::~sysctl</a>()</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> {</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">delete</span>[] name;</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> }</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#ae4fa1e9a1934a5f694a83ba10b008764"> 182</a></span> <span class="keyword">inline</span> sysctl::Integer <a class="code" href="structos_1_1sysctl.html#ae4fa1e9a1934a5f694a83ba10b008764">sysctl::integer</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="keyword"></span>{</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">return</span> Integer(levels, name);</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> }</div><div class="line"><a name="l00186"></a>
<span class="lineno"> 186</span> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00188"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#af54897c91536ccd5d829daabbac64266"> 188</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<std::string></a> <a class="code" href="structos_1_1sysctl.html#af54897c91536ccd5d829daabbac64266">sysctl::string</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="keyword"></span>{</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="comment">// First determine the size of the string.</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordtype">size_t</span> <a class="code" href="namespaceos_1_1stat.html#a7a116891923bc8b5d8c50f78
da8657be">size</a> = 0;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keywordflow">if</span> (::<a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(name, levels, <span class="keyword">nullptr</span>, &size, <span class="keyword">nullptr</span>, 0) == -1) {</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  }</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// Now read it.</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordtype">size_t</span> length = size / <span class="
keyword">sizeof</span>(char);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordtype">char</span>* <a class="code" href="namespaceos.html#aa3debc8caa054e7a0a3bfe4aa42aae07">temp</a> = <span class="keyword">new</span> <span class="keywordtype">char</span>[length];</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">if</span> (::<a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(name, levels, temp, &size, <span class="keyword">nullptr</span>, 0) == -1) {</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <a class="code" href="classError.html">Error</a> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> = <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00201"></a><span class="l
ineno"> 201</span>  <span class="keyword">delete</span>[] <a class="code" href="namespaceos.html#aa3debc8caa054e7a0a3bfe4aa42aae07">temp</a>;</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">return</span> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a>;</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  }</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="comment">// TODO(benh): It's possible that the value has changed since we</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">// determined it's length above. We should really check that we</span></div><div class="line"><a name="l00207"></a><span class="li
neno"> 207</span>  <span class="comment">// get back the same length and if not throw an error.</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="comment">// The "string" in 'temp' might include null bytes, so to get all of</span></div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// the data we need to create a string with 'size' (but we exclude</span></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">// the last null byte via 'size - 1').</span></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  std::string result(temp, size - 1);</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keyword">delete</span>[] <a class
="code" href="namespaceos.html#aa3debc8caa054e7a0a3bfe4aa42aae07">temp</a>;</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">return</span> result;</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> </div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div><div class="line"><a name="l00218"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#aa0170ffd9e615f415e5cef7126831728"> 218</a></span> <span class="keyword">inline</span> <a class="code" href="classTry.html">Try<timeval></a> <a class="code" href="structos_1_1sysctl.html#aa0170ffd9e615f415e5cef7126831728">sysctl::time</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="keyword"></span>{</div><div class="line"
><a name="l00220"></a><span class="lineno"> 220</span>  timeval result;</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordtype">size_t</span> <a class="code" href="namespaceos_1_1stat.html#a7a116891923bc8b5d8c50f78da8657be">size</a> = <span class="keyword">sizeof</span>(result);</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keywordflow">if</span> (::<a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(name, levels, &result, &size, <span class="keyword">nullptr</span>, 0) == -1) {</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</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</spa
n>  <span class="keywordflow">return</span> result;</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> </div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00229"></a><span class="lineno"><a class="line" href="structos_1_1sysctl.html#a519389727f9ecc76af96ed087fcff691"> 229</a></span> <span class="keyword">inline</span> sysctl::Table <a class="code" href="structos_1_1sysctl.html#a519389727f9ecc76af96ed087fcff691">sysctl::table</a>(<span class="keyword">const</span> <a class="code" href="classOption.html">Option<size_t></a>& length)<span class="keyword"> const</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="keyword"></span>{</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordfl
ow">return</span> Table(levels, name, length);</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="keyword">inline</span> sysctl::Integer::Integer(</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordtype">int</span> _levels,</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordtype">int</span>* _name)</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  : levels(_levels),</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  name(_name)</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> {
}</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> sysctl::Integer::operator <a class="code" href="classTry.html">Try<T></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>  T i;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordtype">size_t</span> <a class="code" href="namespaceos_1_1stat.html#a7a116891923bc8b5d8c50f78da8657be">size</a> = <span class="keyword">sizeof</span>(i);</div><div class="line"><a name="l00248"></a><span class="lin
eno"> 248</span>  <span class="keywordflow">if</span> (::<a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(name, levels, &i, &size, <span class="keyword">nullptr</span>, 0) == -1) {</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  }</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">return</span> i;</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> }</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </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="keywo
rd">inline</span> sysctl::Table::Table(</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordtype">int</span> _levels,</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordtype">int</span>* _name,</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<size_t></a>& _length)</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  : levels(_levels),</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  name(_name),</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  length(_length)</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> {}</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div><div clas
s="line"><a name="l00264"></a><span class="lineno"> 264</span> </div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00266"></a><span class="lineno"><a class="line" href="namespaceos.html#a0e6a1f62b1d6cf26d216c980c21ee2cb"> 266</a></span> sysctl::Table::operator <a class="code" href="classTry.html">Try<std::vector<T></a>>()</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>  <span class="keywordtype">size_t</span> <a class="code" href="namespaceos_1_1stat.html#a7a116891923bc8b5d8c50f78da8657be">size</a> = 0;</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">if</span> (length.isNone()) {</div><div class="line"><a name="l00270"></a><span c
lass="lineno"> 270</span>  <span class="keywordflow">if</span> (::<a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(name, levels, <span class="keyword">nullptr</span>, &size, <span class="keyword">nullptr</span>, 0) == -1) {</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">return</span> <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  }</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">if</span> (size % <span class="keyword">sizeof</span>(T) != 0) {</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">return</span> <a class="code" href="classError.html">Error</a>(<span class="stringliteral">"Failed to determine the length of result, "
;</span></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="stringliteral">"amount of available data is not a multiple "</span></div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="stringliteral">"of the table type"</span>);</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  }</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  length = <a class="code" href="classOption.html">Option<size_t></a>(size / <span class="keyword">sizeof</span>(T));</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  }</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  T* ts = <span class="keyword">new</span> T[length.get()];</div><div clas
s="line"><a name="l00282"></a><span class="lineno"> 282</span>  size = length.get() * <span class="keyword">sizeof</span>(T);</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">if</span> (::<a class="code" href="structos_1_1sysctl.html#a670413ae2850bb31a74f552672accf40">sysctl</a>(name, levels, ts, &size, <span class="keyword">nullptr</span>, 0) == -1) {</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <a class="code" href="classError.html">Error</a> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a> = <a class="code" href="classErrnoError.html">ErrnoError</a>();</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keyword">delete</span>[] ts;</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">retu
rn</span> <a class="code" href="namespacemesos_1_1internal_1_1slave_1_1cni_1_1spec.html#ae58e703656ab4a1bd5d9870441236727">error</a>;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  }</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// TODO(benh): It's possible that the value has changed since we</span></div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="comment">// determined it's length above (or from what was specified). We</span></div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="comment">// should really check that we get back the same length and if not</span></div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="comment">// throw an error.</span></div><div cl
ass="line"><a name="l00293"></a><span class="lineno"> 293</span> </div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  length = size / <span class="keyword">sizeof</span>(T);</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  std::vector<T> results;</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < length.get(); i++) {</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  results.push_back(ts[i]);</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keyword">delete</span>[] ts;</div><div class="line"><a name="l00301"></a><span class="lin
eno"> 301</span>  <span class="keywordflow">return</span> results;</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span> }</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> </div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> } <span class="comment">// namespace os {</span></div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="preprocessor">#endif // __STOUT_OS_SYSCTL_HPP__</span></div><div class="ttc" id="classError_html"><div class="ttname"><a href="classError.html">Error</a></div><div class="ttdef"><b>Definition:</b> errorbase.hpp:36</div></div>
<div class="ttc" id="classOption_html"><div class="ttname"><a href="classOption.html">Option< size_t ></a></div></div>
-<div class="ttc" id="namespaceos_1_1stat_html_a7a116891923bc8b5d8c50f78da8657be"><div class="ttname"><a href="namespaceos_1_1stat.html#a7a116891923bc8b5d8c50f78da8657be">os::stat::size</a></div><div class="ttdeci">Try< Bytes > size(const std::string &path, const FollowSymlink follow=FollowSymlink::FOLLOW_SYMLINK)</div><div class="ttdef"><b>Definition:</b> stat.hpp:119</div></div>
+<div class="ttc" id="namespaceos_1_1stat_html_a7a116891923bc8b5d8c50f78da8657be"><div class="ttname"><a href="namespaceos_1_1stat.html#a7a116891923bc8b5d8c50f78da8657be">os::stat::size</a></div><div class="ttdeci">Try< Bytes > size(const std::string &path, const FollowSymlink follow=FollowSymlink::FOLLOW_SYMLINK)</div><div class="ttdef"><b>Definition:</b> stat.hpp:121</div></div>
<div class="ttc" id="classTry_html"><div class="ttname"><a href="classTry.html">Try</a></div><div class="ttdef"><b>Definition:</b> check.hpp:33</div></div>
<div class="ttc" id="none_8hpp_html"><div class="ttname"><a href="none_8hpp.html">none.hpp</a></div></div>
<div class="ttc" id="classErrnoError_html"><div class="ttname"><a href="classErrnoError.html">ErrnoError</a></div><div class="ttdef"><b>Definition:</b> errorbase.hpp:50</div></div>
http://git-wip-us.apache.org/repos/asf/mesos-site/blob/0df7420a/content/api/latest/c++/timeseries_8hpp.html
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Variables</h2></td></tr>
-<tr class="memitem:a1865c52e226d6f280d63dd80884dd959"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="classDuration.html">Duration</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceprocess.html#a1865c52e226d6f280d63dd80884dd959">process::TIME_SERIES_WINDOW</a></td></tr>
-<tr class="separator:a1865c52e226d6f280d63dd80884dd959"><td class="memSeparator" colspan="2"> </td></tr>
-<tr class="memitem:a242c384165e598356687505925d93a6e"><td class="memItemLeft" align="right" valign="top">const size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceprocess.html#a242c384165e598356687505925d93a6e">process::TIME_SERIES_CAPACITY</a></td></tr>
-<tr class="separator:a242c384165e598356687505925d93a6e"><td class="memSeparator" colspan="2"> </td></tr>
+<tr class="memitem:a79124011954c164c6178289973461ab5"><td class="memItemLeft" align="right" valign="top">constexpr <a class="el" href="classDuration.html">Duration</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceprocess.html#a79124011954c164c6178289973461ab5">process::TIME_SERIES_WINDOW</a> = <a class="el" href="classWeeks.html">Weeks</a>(2)</td></tr>
+<tr class="separator:a79124011954c164c6178289973461ab5"><td class="memSeparator" colspan="2"> </td></tr>
+<tr class="memitem:a06430e17cbf61305d44507af542da391"><td class="memItemLeft" align="right" valign="top">constexpr size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceprocess.html#a06430e17cbf61305d44507af542da391">process::TIME_SERIES_CAPACITY</a> = 1000</td></tr>
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