labs/lab06/code/timer.cpp.html

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<pre><b><span style="color:#000080">#include</span></b> <span style="color:#FF0000">"timer.h"</span>

timer<span style="color:#990000">::</span><b><span style="color:#000000">timer</span></b><span style="color:#990000">()</span> <span style="color:#FF0000">{</span>
    running <span style="color:#990000">=</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>

timer<span style="color:#990000">::</span><b><span style="color:#000000">timer</span></b><span style="color:#990000">(</span>timer<span style="color:#990000">&amp;</span> t<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
    running <span style="color:#990000">=</span> t<span style="color:#990000">.</span>running<span style="color:#990000">;</span>
    start_time <span style="color:#990000">=</span> t<span style="color:#990000">.</span>start_time<span style="color:#990000">;</span>
    stop_time <span style="color:#990000">=</span> t<span style="color:#990000">.</span>stop_time<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>

<span style="color:#009900">void</span> timer<span style="color:#990000">::</span><b><span style="color:#000000">start</span></b><span style="color:#990000">()</span> <span style="color:#FF0000">{</span>
    <b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(!</span>running<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
        running <span style="color:#990000">=</span> <b><span style="color:#0000FF">true</span></b><span style="color:#990000">;</span>
        start_time <span style="color:#990000">=</span> steady_clock<span style="color:#990000">::</span><b><span style="color:#000000">now</span></b><span style="color:#990000">();</span>
    <span style="color:#FF0000">}</span>
<span style="color:#FF0000">}</span>

<span style="color:#009900">void</span> timer<span style="color:#990000">::</span><b><span style="color:#000000">stop</span></b><span style="color:#990000">()</span> <span style="color:#FF0000">{</span>
    <b><span style="color:#0000FF">if</span></b> <span style="color:#990000">(</span>running<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
        running <span style="color:#990000">=</span> <b><span style="color:#0000FF">false</span></b><span style="color:#990000">;</span>
        stop_time <span style="color:#990000">=</span> steady_clock<span style="color:#990000">::</span><b><span style="color:#000000">now</span></b><span style="color:#990000">();</span>
    <span style="color:#FF0000">}</span>
<span style="color:#FF0000">}</span>

<i><span style="color:#9A1900">// Returns the time elapsed, in seconds</span></i>
<span style="color:#009900">double</span> timer<span style="color:#990000">::</span><b><span style="color:#000000">getTime</span></b><span style="color:#990000">()</span> <span style="color:#FF0000">{</span>
    <i><span style="color:#9A1900">// Cast the intrinsic duration to seconds, but use a double so that we can</span></i>
    <i><span style="color:#9A1900">// have fractional seconds to represent anything more precise (i.e. microseconds)</span></i>
    <b><span style="color:#0000FF">return</span></b> duration_cast<span style="color:#990000">&lt;</span>duration<span style="color:#990000">&lt;</span><span style="color:#009900">double</span><span style="color:#990000">&gt;&gt;(</span>stop_time <span style="color:#990000">-</span> start_time<span style="color:#990000">).</span><b><span style="color:#000000">count</span></b><span style="color:#990000">();</span>
<span style="color:#FF0000">}</span>

ostream<span style="color:#990000">&amp;</span> <b><span style="color:#0000FF">operator</span></b><span style="color:#990000">&lt;&lt;(</span>ostream<span style="color:#990000">&amp;</span> out<span style="color:#990000">,</span> timer<span style="color:#990000">&amp;</span> t<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
    <b><span style="color:#0000FF">return</span></b> out <span style="color:#990000">&lt;&lt;</span> <b><span style="color:#000000">to_string</span></b><span style="color:#990000">(</span>t<span style="color:#990000">.</span><b><span style="color:#000000">getTime</span></b><span style="color:#990000">());</span>
<span style="color:#FF0000">}</span>
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