icuSources/test/usetperf/timer.h

   1 /*
   2 **********************************************************************
   3 * Copyright (c) 2002-2004, International Business Machines
   4 * Corporation and others.  All Rights Reserved.
   5 **********************************************************************
   6 * 2002-09-20 aliu Created.
   7 */
   8 #ifndef __PERFTIMER_H__
   9 #define __PERFTIMER_H__
  10
  11 #include "unicode/utypes.h"
  12
  13 // Derived from Ram's perftime.h
  14
  15 //----------------------------------------------------------------------
  16 // Win32
  17
  18 #if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
  19
  20 #include <windows.h>
  21
  22 class Timer {
  23     LARGE_INTEGER tstart, tend;
  24 public:
  25     Timer() {}
  26     inline void start() {
  27         QueryPerformanceCounter(&tstart);
  28     }
  29     inline double stop() {
  30         QueryPerformanceCounter(&tend);
  31         LARGE_INTEGER freq;
  32         int result = QueryPerformanceFrequency(&freq);
  33         return ((double)(tend.QuadPart - tstart.QuadPart))/((double)freq.QuadPart);
  34     }
  35 };
  36
  37 //----------------------------------------------------------------------
  38 // UNIX
  39
  40 #else
  41
  42 #include <sys/time.h>
  43
  44 class Timer {
  45     struct timeval tstart, tend;
  46     struct timezone tz;
  47 public:
  48     Timer() {}
  49     inline void start() {
  50         gettimeofday(&tstart, &tz);
  51     }
  52     inline double stop() {
  53         gettimeofday(&tend, &tz);
  54         double t1, t2;
  55         t1 = (double)tstart.tv_sec + (double)tstart.tv_usec*1e-6;
  56         t2 = (double)tend.tv_sec + (double)tend.tv_usec*1e-6;
  57         return t2-t1;
  58     }
  59 };
  60
  61 #endif
  62 #endif