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<div class="title">timer.hpp</div> </div>
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<a href="metrics_2timer_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 under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<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>&#160;<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>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<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>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<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>&#160;<span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<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>&#160;<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>&#160;<span class="comment">// limitations under the License</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;</div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor">#ifndef __PROCESS_METRICS_TIMER_HPP__</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define __PROCESS_METRICS_TIMER_HPP__</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="preprocessor">#include &lt;atomic&gt;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="clock_8hpp.html">process/clock.hpp</a>&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</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="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="metric_8hpp.html">process/metrics/metric.hpp</a>&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</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="l00026"></a><span class="lineno"> 26</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="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="option_8hpp.html">stout/option.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="synchronized_8hpp.html">stout/synchronized.hpp</a>&gt;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</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="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceos.html#ae19e4161a51b86a1f330f3bf1dc75389">process</a> {</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceprocess_1_1metrics_1_1internal.html#aaa37243f659788386a13de558eba70a7">metrics</a> {</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="comment">// A Metric that represents a timed event. It is templated on a Duration</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="comment">// subclass that specifies the unit to use for the Timer.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;</div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="classprocess_1_1metrics_1_1Timer.html"> 37</a></span>&#160;<span class="keyword">class </span><a class="code" href="classprocess_1_1metrics_1_1Timer.html">Timer</a> : <span class="keyword">public</span> <a class="code" href="classprocess_1_1metrics_1_1Metric.html">Metric</a></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;{</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="comment">// The Timer name will have a unit suffix added automatically.</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <a class="code" href="classprocess_1_1metrics_1_1Timer.html">Timer</a>(<span class="keyword">const</span> std::string&amp; <a class="code" href="classprocess_1_1metrics_1_1Metric.html#a5b8063ac3b08d202c2f1736661ba1950">name</a>, <span class="keyword">const</span> <a class="code" href="classOption.html">Option&lt;Duration&gt;</a>&amp; <a class="code" href="classprocess_1_1metrics_1_1Timer.html#a0701b27ce84c3c244687803014e6a249">window</a> = <a class="code" href="structNone.html">None</a>())</div>
<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="classprocess_1_1metrics_1_1Timer.html#a0701b27ce84c3c244687803014e6a249"> 42</a></span>&#160; : <a class="code" href="classprocess_1_1metrics_1_1Metric.html">Metric</a>(name + <span class="stringliteral">&quot;_&quot;</span> + T::units(), <a class="code" href="classprocess_1_1metrics_1_1Timer.html#a0701b27ce84c3c244687803014e6a249">window</a>),</div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="classprocess_1_1metrics_1_1Timer.html#af7c2309b205e5f6e4a3b27fa9a08b4b9"> 43</a></span>&#160; data(new Data()) {}</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div>
<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="classprocess_1_1metrics_1_1Timer.html#adec20d769e4105799cc1b236bd953e81"> 45</a></span>&#160; <a class="code" href="classprocess_1_1Future.html">Future&lt;double&gt;</a> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#adec20d769e4105799cc1b236bd953e81">value</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;<span class="keyword"> </span>{</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <a class="code" href="classprocess_1_1Future.html">Future&lt;double&gt;</a> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#adec20d769e4105799cc1b236bd953e81">value</a>;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keyword">synchronized</span> (data-&gt;lock) {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keywordflow">if</span> (data-&gt;lastValue.isSome()) {</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; value = data-&gt;lastValue.get();</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; value = <a class="code" href="structprocess_1_1Failure.html">Failure</a>(<span class="stringliteral">&quot;No value&quot;</span>);</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; }</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;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#adec20d769e4105799cc1b236bd953e81">value</a>;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; }</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="comment">// Start the Timer.</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classprocess_1_1metrics_1_1Timer.html#a80f762ca1f2549d14c3ac54a93caa044"> 61</a></span>&#160; <span class="keywordtype">void</span> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#a80f762ca1f2549d14c3ac54a93caa044">start</a>()</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keyword">synchronized</span> (data-&gt;lock) {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; data-&gt;start = <a class="code" href="classprocess_1_1Clock.html#a24ed3f746bb6b3ddb1c52dce5e0ecd38">Clock::now</a>();</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; }</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="comment">// Stop the Timer.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="classprocess_1_1metrics_1_1Timer.html#add113450a55bb835137f84701f981fcc"> 69</a></span>&#160; T <a class="code" href="classprocess_1_1metrics_1_1Timer.html#add113450a55bb835137f84701f981fcc">stop</a>()</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; {</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keyword">const</span> <a class="code" href="classprocess_1_1Time.html">Time</a> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#add113450a55bb835137f84701f981fcc">stop</a> = <a class="code" href="classprocess_1_1Clock.html#a24ed3f746bb6b3ddb1c52dce5e0ecd38">Clock::now</a>();</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; T t(0);</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keywordtype">double</span> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#adec20d769e4105799cc1b236bd953e81">value</a> = 0.0;</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="keyword">synchronized</span> (data-&gt;lock) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; t = T(stop - data-&gt;start);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; data-&gt;lastValue = t.value();</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; value = data-&gt;lastValue.get();</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; <a class="code" href="classprocess_1_1metrics_1_1Metric.html#a062843ad9a1376532c176370a09e29d2">push</a>(value);</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <span class="keywordflow">return</span> t;</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;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <span class="comment">// Time an asynchronous event.</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">typename</span> U&gt;</div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="classprocess_1_1metrics_1_1Timer.html#a434e22286a5dbc8ec2b8501499d159c4"> 92</a></span>&#160; <a class="code" href="classprocess_1_1Future.html">Future&lt;U&gt;</a> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#a434e22286a5dbc8ec2b8501499d159c4">time</a>(<span class="keyword">const</span> <a class="code" href="classprocess_1_1Future.html">Future&lt;U&gt;</a>&amp; future)</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="comment">// We need to take a copy of &#39;this&#39; here to ensure that the</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="comment">// Timer is not destroyed in the interim.</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; future</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; .<a class="code" href="classprocess_1_1Future.html#a71bde220aed3c725cef2040f63adf42a">onAny</a>(<a class="code" href="namespaceprocess_1_1network.html#ad067110a4b38cc83785a43f49bf6c8e2">lambda::bind</a>(_time, <a class="code" href="classprocess_1_1Clock.html#a24ed3f746bb6b3ddb1c52dce5e0ecd38">Clock::now</a>(), *<span class="keyword">this</span>));</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="keywordflow">return</span> future;</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;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keyword">struct </span>Data {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; Data() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; std::atomic_flag lock = ATOMIC_FLAG_INIT;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <a class="code" href="classprocess_1_1Time.html">Time</a> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#a80f762ca1f2549d14c3ac54a93caa044">start</a>;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <a class="code" href="classOption.html">Option&lt;double&gt;</a> lastValue;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; };</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; <span class="keyword">static</span> <span class="keywordtype">void</span> _time(<a class="code" href="classprocess_1_1Time.html">Time</a> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#a80f762ca1f2549d14c3ac54a93caa044">start</a>, <a class="code" href="classprocess_1_1Timer.html">Timer</a> that)</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; {</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keyword">const</span> <a class="code" href="classprocess_1_1Time.html">Time</a> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#add113450a55bb835137f84701f981fcc">stop</a> = <a class="code" href="classprocess_1_1Clock.html#a24ed3f746bb6b3ddb1c52dce5e0ecd38">Clock::now</a>();</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">double</span> <a class="code" href="classprocess_1_1metrics_1_1Timer.html#adec20d769e4105799cc1b236bd953e81">value</a>;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="keyword">synchronized</span> (that.data-&gt;lock) {</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; that.data-&gt;lastValue = T(stop - start).value();</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; value = that.data-&gt;lastValue.get();</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; }</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; that.push(value);</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;</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; std::shared_ptr&lt;Data&gt; data;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;};</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160;} <span class="comment">// namespace metrics {</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;} <span class="comment">// namespace process {</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;<span class="preprocessor">#endif // __PROCESS_METRICS_TIMER_HPP__</span></div>
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<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&lt; T &gt; &amp; onAny(AnyCallback &amp;&amp;callback) const </div><div class="ttdef"><b>Definition:</b> future.hpp:1265</div></div>
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