Shuto Naruse / Mbed 2 deprecated Eurobot2012_Secondary

Eurobot2012_Secondary

Fork of Eurobot_2012_Secondary by Shuto Naruse

tvmet/util/Timer.h@1:cc2a9eb0bd55, 2012-10-17 (annotated)

Committer:
narshu
Date:
Wed Oct 17 22:25:31 2012 +0000
Revision:
1:cc2a9eb0bd55
Commit before publishing

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narshu 1:cc2a9eb0bd55 1 /*
narshu 1:cc2a9eb0bd55 2 * Tiny Vector Matrix Library
narshu 1:cc2a9eb0bd55 3 * Dense Vector Matrix Libary of Tiny size using Expression Templates
narshu 1:cc2a9eb0bd55 4 *
narshu 1:cc2a9eb0bd55 5 * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
narshu 1:cc2a9eb0bd55 6 *
narshu 1:cc2a9eb0bd55 7 * This library is free software; you can redistribute it and/or
narshu 1:cc2a9eb0bd55 8 * modify it under the terms of the GNU Lesser General Public
narshu 1:cc2a9eb0bd55 9 * License as published by the Free Software Foundation; either
narshu 1:cc2a9eb0bd55 10 * version 2.1 of the License, or (at your option) any later version.
narshu 1:cc2a9eb0bd55 11 *
narshu 1:cc2a9eb0bd55 12 * This library is distributed in the hope that it will be useful,
narshu 1:cc2a9eb0bd55 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
narshu 1:cc2a9eb0bd55 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
narshu 1:cc2a9eb0bd55 15 * Lesser General Public License for more details.
narshu 1:cc2a9eb0bd55 16 *
narshu 1:cc2a9eb0bd55 17 * You should have received a copy of the GNU Lesser General Public
narshu 1:cc2a9eb0bd55 18 * License along with this library; if not, write to the Free Software
narshu 1:cc2a9eb0bd55 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
narshu 1:cc2a9eb0bd55 20 *
narshu 1:cc2a9eb0bd55 21 * $Id: Timer.h,v 1.9 2007-06-23 15:58:59 opetzold Exp $
narshu 1:cc2a9eb0bd55 22 */
narshu 1:cc2a9eb0bd55 23
narshu 1:cc2a9eb0bd55 24 #ifndef TVMET_UTIL_TIMER_H
narshu 1:cc2a9eb0bd55 25 #define TVMET_UTIL_TIMER_H
narshu 1:cc2a9eb0bd55 26
narshu 1:cc2a9eb0bd55 27 #if defined(TVMET_HAVE_SYS_TIME_H) && defined(TVMET_HAVE_UNISTD_H)
narshu 1:cc2a9eb0bd55 28 # include <sys/time.h>
narshu 1:cc2a9eb0bd55 29 # include <sys/resource.h>
narshu 1:cc2a9eb0bd55 30 # include <unistd.h>
narshu 1:cc2a9eb0bd55 31 #else
narshu 1:cc2a9eb0bd55 32 # include <ctime>
narshu 1:cc2a9eb0bd55 33 #endif
narshu 1:cc2a9eb0bd55 34
narshu 1:cc2a9eb0bd55 35 namespace tvmet {
narshu 1:cc2a9eb0bd55 36
narshu 1:cc2a9eb0bd55 37 namespace util {
narshu 1:cc2a9eb0bd55 38
narshu 1:cc2a9eb0bd55 39 /**
narshu 1:cc2a9eb0bd55 40 \class Timer Timer.h "tvmet/util/Timer.h"
narshu 1:cc2a9eb0bd55 41 \brief A quick& dirty portable timer, measures elapsed time.
narshu 1:cc2a9eb0bd55 42
narshu 1:cc2a9eb0bd55 43 It is recommended that implementations measure wall clock rather than CPU
narshu 1:cc2a9eb0bd55 44 time since the intended use is performance measurement on systems where
narshu 1:cc2a9eb0bd55 45 total elapsed time is more important than just process or CPU time.
narshu 1:cc2a9eb0bd55 46
narshu 1:cc2a9eb0bd55 47 The accuracy of timings depends on the accuracy of timing information
narshu 1:cc2a9eb0bd55 48 provided by the underlying platform, and this varies from platform to
narshu 1:cc2a9eb0bd55 49 platform.
narshu 1:cc2a9eb0bd55 50 */
narshu 1:cc2a9eb0bd55 51
narshu 1:cc2a9eb0bd55 52 class Timer
narshu 1:cc2a9eb0bd55 53 {
narshu 1:cc2a9eb0bd55 54 Timer(const Timer&);
narshu 1:cc2a9eb0bd55 55 Timer& operator=(const Timer&);
narshu 1:cc2a9eb0bd55 56
narshu 1:cc2a9eb0bd55 57 public: // types
narshu 1:cc2a9eb0bd55 58 typedef double time_t;
narshu 1:cc2a9eb0bd55 59
narshu 1:cc2a9eb0bd55 60 public:
narshu 1:cc2a9eb0bd55 61 /** starts the timer immediatly. */
narshu 1:cc2a9eb0bd55 62 Timer() { m_start_time = getTime(); }
narshu 1:cc2a9eb0bd55 63
narshu 1:cc2a9eb0bd55 64 /** restarts the timer */
narshu 1:cc2a9eb0bd55 65 void restart() { m_start_time = getTime(); }
narshu 1:cc2a9eb0bd55 66
narshu 1:cc2a9eb0bd55 67 /** return elapsed time in seconds */
narshu 1:cc2a9eb0bd55 68 time_t elapsed() const { return (getTime() - m_start_time); }
narshu 1:cc2a9eb0bd55 69
narshu 1:cc2a9eb0bd55 70 private:
narshu 1:cc2a9eb0bd55 71 time_t getTime() const {
narshu 1:cc2a9eb0bd55 72 #if defined(TVMET_HAVE_SYS_TIME_H) && defined(TVMET_HAVE_UNISTD_H)
narshu 1:cc2a9eb0bd55 73 getrusage(RUSAGE_SELF, &m_rusage);
narshu 1:cc2a9eb0bd55 74 time_t sec = m_rusage.ru_utime.tv_sec; // user, no system time
narshu 1:cc2a9eb0bd55 75 time_t usec = m_rusage.ru_utime.tv_usec; // user, no system time
narshu 1:cc2a9eb0bd55 76 return sec + usec/1e6;
narshu 1:cc2a9eb0bd55 77 #else
narshu 1:cc2a9eb0bd55 78 return static_cast<time_t>(std::clock()) / static_cast<time_t>(CLOCKS_PER_SEC);
narshu 1:cc2a9eb0bd55 79 #endif
narshu 1:cc2a9eb0bd55 80 }
narshu 1:cc2a9eb0bd55 81
narshu 1:cc2a9eb0bd55 82 private:
narshu 1:cc2a9eb0bd55 83 #if defined(TVMET_HAVE_SYS_TIME_H) && defined(TVMET_HAVE_UNISTD_H)
narshu 1:cc2a9eb0bd55 84 mutable struct rusage m_rusage;
narshu 1:cc2a9eb0bd55 85 #endif
narshu 1:cc2a9eb0bd55 86 time_t m_start_time;
narshu 1:cc2a9eb0bd55 87 };
narshu 1:cc2a9eb0bd55 88
narshu 1:cc2a9eb0bd55 89 } // namespace util
narshu 1:cc2a9eb0bd55 90
narshu 1:cc2a9eb0bd55 91 } // namespace tvmet
narshu 1:cc2a9eb0bd55 92
narshu 1:cc2a9eb0bd55 93 #endif // TVMET_UTIL_TIMER_H
narshu 1:cc2a9eb0bd55 94
narshu 1:cc2a9eb0bd55 95 // Local Variables:
narshu 1:cc2a9eb0bd55 96 // mode:C++
narshu 1:cc2a9eb0bd55 97 // tab-width:8
narshu 1:cc2a9eb0bd55 98 // End: