63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
/*
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**********************************************************************
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* Copyright (c) 2002, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* 2002-09-20 aliu Created.
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*/
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#ifndef __PERFTIMER_H__
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#define __PERFTIMER_H__
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#include "unicode/utypes.h"
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// Derived from Ram's perftime.h
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//----------------------------------------------------------------------
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// Win32
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#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
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#include <windows.h>
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class Timer {
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LARGE_INTEGER tstart, tend;
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public:
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Timer() {}
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inline void start() {
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QueryPerformanceCounter(&tstart);
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}
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inline double stop() {
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QueryPerformanceCounter(&tend);
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LARGE_INTEGER freq;
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int result = QueryPerformanceFrequency(&freq);
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return ((double)(tend.QuadPart - tstart.QuadPart))/((double)freq.QuadPart);
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}
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};
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//----------------------------------------------------------------------
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// UNIX
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#else
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#include <sys/time.h>
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class Timer {
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struct timeval tstart, tend;
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struct timezone tz;
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public:
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Timer() {}
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inline void start() {
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gettimeofday(&tstart, &tz);
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}
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inline double stop() {
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gettimeofday(&tend, &tz);
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double t1, t2;
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t1 = (double)tstart.tv_sec + (double)tstart.tv_usec*1e-6;
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t2 = (double)tend.tv_sec + (double)tend.tv_usec*1e-6;
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return t2-t1;
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}
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};
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#endif
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#endif
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