1 //===================================================== 2 // File : portable_timer.hh 3 // Author : L. Plagne <laurent.plagne (at) edf.fr)> from boost lib 4 // Copyright (C) EDF R&D, lun sep 30 14:23:17 CEST 2002 5 //===================================================== 6 // 7 // This program is free software; you can redistribute it and/or 8 // modify it under the terms of the GNU General Public License 9 // as published by the Free Software Foundation; either version 2 10 // of the License, or (at your option) any later version. 11 // 12 // This program is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 // You should have received a copy of the GNU General Public License 17 // along with this program; if not, write to the Free Software 18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 // 20 // simple_time extracted from the boost library 21 // 22 #ifndef _PORTABLE_TIMER_HH 23 #define _PORTABLE_TIMER_HH 24 25 #include <ctime> 26 #include <cstdlib> 27 28 #include <time.h> 29 30 31 #define USEC_IN_SEC 1000000 32 33 34 // timer -------------------------------------------------------------------// 35 36 // A timer object measures CPU time. 37 #if defined(_MSC_VER) 38 39 #define NOMINMAX 40 #include <windows.h> 41 42 /*#ifndef hr_timer 43 #include "hr_time.h" 44 #define hr_timer 45 #endif*/ 46 47 class Portable_Timer 48 { 49 public: 50 51 typedef struct { 52 LARGE_INTEGER start; 53 LARGE_INTEGER stop; 54 } stopWatch; 55 56 57 Portable_Timer() 58 { 59 startVal.QuadPart = 0; 60 stopVal.QuadPart = 0; 61 QueryPerformanceFrequency(&frequency); 62 } 63 64 void start() { QueryPerformanceCounter(&startVal); } 65 66 void stop() { QueryPerformanceCounter(&stopVal); } 67 68 double elapsed() { 69 LARGE_INTEGER time; 70 time.QuadPart = stopVal.QuadPart - startVal.QuadPart; 71 return LIToSecs(time); 72 } 73 74 double user_time() { return elapsed(); } 75 76 77 private: 78 79 double LIToSecs(LARGE_INTEGER& L) { 80 return ((double)L.QuadPart /(double)frequency.QuadPart) ; 81 } 82 83 LARGE_INTEGER startVal; 84 LARGE_INTEGER stopVal; 85 LARGE_INTEGER frequency; 86 87 88 }; // Portable_Timer 89 90 #elif defined(__APPLE__) 91 #include <CoreServices/CoreServices.h> 92 #include <mach/mach_time.h> 93 94 95 class Portable_Timer 96 { 97 public: 98 99 Portable_Timer() 100 { 101 } 102 103 void start() 104 { 105 m_start_time = double(mach_absolute_time())*1e-9;; 106 107 } 108 109 void stop() 110 { 111 m_stop_time = double(mach_absolute_time())*1e-9;; 112 113 } 114 115 double elapsed() 116 { 117 return user_time(); 118 } 119 120 double user_time() 121 { 122 return m_stop_time - m_start_time; 123 } 124 125 126 private: 127 128 double m_stop_time, m_start_time; 129 130 }; // Portable_Timer (Apple) 131 132 #else 133 134 #include <sys/time.h> 135 #include <sys/resource.h> 136 #include <unistd.h> 137 #include <sys/times.h> 138 139 class Portable_Timer 140 { 141 public: 142 143 Portable_Timer() 144 { 145 m_clkid = BtlConfig::Instance.realclock ? CLOCK_REALTIME : CLOCK_PROCESS_CPUTIME_ID; 146 } 147 148 Portable_Timer(int clkid) : m_clkid(clkid) 149 {} 150 151 void start() 152 { 153 timespec ts; 154 clock_gettime(m_clkid, &ts); 155 m_start_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec); 156 157 } 158 159 void stop() 160 { 161 timespec ts; 162 clock_gettime(m_clkid, &ts); 163 m_stop_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec); 164 165 } 166 167 double elapsed() 168 { 169 return user_time(); 170 } 171 172 double user_time() 173 { 174 return m_stop_time - m_start_time; 175 } 176 177 178 private: 179 180 int m_clkid; 181 double m_stop_time, m_start_time; 182 183 }; // Portable_Timer (Linux) 184 185 #endif 186 187 #endif // PORTABLE_TIMER_HPP 188
