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//=====================================================
// File : portable_timer.hh
// Author : L. Plagne <laurent.plagne@edf.fr)> from boost lib
// Copyright (C) EDF R&D, lun sep 30 14:23:17 CEST 2002
//=====================================================
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// simple_time extracted from the boost library
//
#ifndef _PORTABLE_TIMER_HH
#define _PORTABLE_TIMER_HH
#include <ctime>
#include <cstdlib>
#include <time.h>
#define USEC_IN_SEC 1000000
// timer -------------------------------------------------------------------//
// A timer object measures CPU time.
#if defined(_MSC_VER)
#define NOMINMAX
#include <windows.h>
/*#ifndef hr_timer
#include "hr_time.h"
#define hr_timer
#endif*/
class Portable_Timer
{
public:
typedef struct {
LARGE_INTEGER start;
LARGE_INTEGER stop;
} stopWatch;
Portable_Timer()
{
startVal.QuadPart = 0;
stopVal.QuadPart = 0;
QueryPerformanceFrequency(&frequency);
}
void start() { QueryPerformanceCounter(&startVal); }
void stop() { QueryPerformanceCounter(&stopVal); }
double elapsed() {
LARGE_INTEGER time;
time.QuadPart = stopVal.QuadPart - startVal.QuadPart;
return LIToSecs(time);
}
double user_time() { return elapsed(); }
private:
double LIToSecs(LARGE_INTEGER& L) {
return ((double)L.QuadPart /(double)frequency.QuadPart) ;
}
LARGE_INTEGER startVal;
LARGE_INTEGER stopVal;
LARGE_INTEGER frequency;
}; // Portable_Timer
#elif defined(__APPLE__)
#include <CoreServices/CoreServices.h>
#include <mach/mach_time.h>
class Portable_Timer
{
public:
Portable_Timer()
{
}
void start()
{
m_start_time = double(mach_absolute_time())*1e-9;;
}
void stop()
{
m_stop_time = double(mach_absolute_time())*1e-9;;
}
double elapsed()
{
return user_time();
}
double user_time()
{
return m_stop_time - m_start_time;
}
private:
double m_stop_time, m_start_time;
}; // Portable_Timer (Apple)
#else
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <sys/times.h>
class Portable_Timer
{
public:
Portable_Timer()
{
m_clkid = BtlConfig::Instance.realclock ? CLOCK_REALTIME : CLOCK_PROCESS_CPUTIME_ID;
}
Portable_Timer(int clkid) : m_clkid(clkid)
{}
void start()
{
timespec ts;
clock_gettime(m_clkid, &ts);
m_start_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);
}
void stop()
{
timespec ts;
clock_gettime(m_clkid, &ts);
m_stop_time = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);
}
double elapsed()
{
return user_time();
}
double user_time()
{
return m_stop_time - m_start_time;
}
private:
int m_clkid;
double m_stop_time, m_start_time;
}; // Portable_Timer (Linux)
#endif
#endif // PORTABLE_TIMER_HPP
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