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annotate modules/net/examples/elapsed-timer.cpp @ 512:0002b8da93dc

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Net: rework a lot, going to stabilization soon
author David Demelier <markand@malikania.fr>
date Mon, 04 Apr 2016 17:34:01 +0200
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1 /*
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2 * elapsed-timer.cpp -- measure elapsed time
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3 *
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4 * Copyright (c) 2013-2015 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include "elapsed-timer.h"
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20
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21 using std::chrono::duration_cast;
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22 using std::chrono::high_resolution_clock;
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23 using std::chrono::milliseconds;
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24
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25 ElapsedTimer::ElapsedTimer() noexcept
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26 {
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27 m_last = high_resolution_clock::now();
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28 }
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29
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30 void ElapsedTimer::pause() noexcept
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31 {
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32 /*
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33 * When we put the timer on pause, do not forget to set the already
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34 * elapsed time.
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35 */
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36 (void)elapsed();
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37 m_paused = true;
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38 }
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39
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40 void ElapsedTimer::restart() noexcept
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41 {
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42 m_paused = false;
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43 m_last = high_resolution_clock::now();
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44 }
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45
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46 void ElapsedTimer::reset() noexcept
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47 {
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48 m_elapsed = 0;
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49 m_last = high_resolution_clock::now();
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50 }
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51
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52 unsigned ElapsedTimer::elapsed() noexcept
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53 {
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54 if (!m_paused) {
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55 m_elapsed += duration_cast<milliseconds>(high_resolution_clock::now() - m_last).count();
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56 m_last = high_resolution_clock::now();
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57 }
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58
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59 return m_elapsed;
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60 }