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/*!
* \file
* \brief Implementation of Timing classes
* \author Thomas Eriksson, Tony Ottosson, Tobias Ringstrom and Adam Piatyszek
*
* -------------------------------------------------------------------------
*
* IT++ - C++ library of mathematical, signal processing, speech processing,
* and communications classes and functions
*
* Copyright (C) 1995-2008 (see AUTHORS file for a list of contributors)
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* -------------------------------------------------------------------------
*/
#ifndef _MSC_VER
# include <itpp/config.h>
#else
# include <itpp/config_msvc.h>
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <ctime>
#else
# ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <ctime>
# endif
#endif
#include <itpp/base/timing.h>
#include <iostream>
#include <cmath>
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <windows.h>
int gettimeofday(struct timeval* p, void* tz)
{
union {
long long ns100; /* time since 1 Jan 1601 in 100ns units */
FILETIME ft;
} _now;
GetSystemTimeAsFileTime(&(_now.ft));
p->tv_usec = (long)((_now.ns100 / 10LL) % 1000000LL);
/* time since 1 Jan 1970 */
p->tv_sec= (long)((_now.ns100 - 116444736000000000LL) / 10000000LL);
return 0;
}
#endif
namespace itpp {
//! Global object for tic and toc functions
Real_Timer __tic_toc_timer;
//----------------------------------------------------------------------------
// class Timer
//----------------------------------------------------------------------------
Timer::Timer()
{
reset();
}
void Timer::start(void)
{
if (!running) {
start_time = get_current_time();
running = true;
}
}
double Timer::stop(void)
{
if (running) {
stop_time = get_current_time();
elapsed_time += stop_time-start_time;
running = false;
}
return elapsed_time;
}
void Timer::reset(double t)
{
elapsed_time = t;
start_time = 0;
stop_time = 0;
running = false;
}
double Timer::get_time() const
{
return running ?
elapsed_time + get_current_time() - start_time :
elapsed_time;
}
void Timer::tic(void)
{
reset();
start();
}
double Timer::toc(void)
{
return get_time() ;
}
void Timer::toc_print(void)
{
std::cout << "Elapsed time = " << get_time() << " seconds" << std::endl;
}
//----------------------------------------------------------------------------
// class CPU_Timer
//----------------------------------------------------------------------------
double CPU_Timer::get_current_time() const
{
return static_cast<double>(clock()) / CLOCKS_PER_SEC;
}
//----------------------------------------------------------------------------
// class Real_Timer
//----------------------------------------------------------------------------
double Real_Timer::get_current_time() const
{
struct timeval t;
gettimeofday(&t, 0);
return t.tv_sec + t.tv_usec * 1.0e-6;
}
void tic()
{
__tic_toc_timer.tic();
}
double toc()
{
return __tic_toc_timer.toc();
}
void toc_print()
{
__tic_toc_timer.toc_print();
}
void pause(double t)
{
if (t==-1) {
std::cout << "(Press enter to continue)" << std::endl;
getchar();
} else {
Real_Timer T;
T.start();
while (T.get_time()<t);
}
}
} // namespace itpp
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