/usr/include/stxxl/bits/common/timer.h is in libstxxl-dev 1.3.1-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* include/stxxl/bits/common/timer.h
*
* Part of the STXXL. See http://stxxl.sourceforge.net
*
* Copyright (C) 2002, 2005 Roman Dementiev <dementiev@mpi-sb.mpg.de>
* Copyright (C) 2007-2009 Andreas Beckmann <beckmann@cs.uni-frankfurt.de>
* Copyright (C) 2008 Johannes Singler <singler@ira.uka.de>
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
* http://www.boost.org/LICENSE_1_0.txt)
**************************************************************************/
#ifndef STXXL_TIMER_HEADER
#define STXXL_TIMER_HEADER
#ifdef STXXL_BOOST_TIMESTAMP
#include <boost/date_time/posix_time/posix_time.hpp>
#include <cmath>
#else
#include <ctime>
#include <sys/time.h>
#endif
#include <stxxl/bits/namespace.h>
__STXXL_BEGIN_NAMESPACE
//! \brief Returns number of seconds since the epoch, high resolution.
inline double
timestamp()
{
#ifdef STXXL_BOOST_TIMESTAMP
boost::posix_time::ptime MyTime = boost::posix_time::microsec_clock::local_time();
boost::posix_time::time_duration Duration =
MyTime - boost::posix_time::time_from_string("1970-01-01 00:00:00.000");
double sec = double(Duration.hours()) * 3600. +
double(Duration.minutes()) * 60. +
double(Duration.seconds()) +
double(Duration.fractional_seconds()) / (pow(10., Duration.num_fractional_digits()));
return sec;
#else
struct timeval tp;
gettimeofday(&tp, NULL);
return double(tp.tv_sec) + tp.tv_usec / 1000000.;
#endif
}
class timer
{
bool running;
double accumulated;
double last_clock;
inline double timestamp();
public:
inline timer(bool start_immediately = false);
inline void start();
inline void stop();
inline void reset();
inline double seconds();
inline double mseconds();
inline double useconds();
};
timer::timer(bool start_immediately) : running(false), accumulated(0.)
{
if (start_immediately)
start();
}
double timer::timestamp()
{
return stxxl::timestamp();
}
void timer::start()
{
running = true;
last_clock = timestamp();
}
void timer::stop()
{
running = false;
accumulated += timestamp() - last_clock;
}
void timer::reset()
{
accumulated = 0.;
last_clock = timestamp();
}
double timer::mseconds()
{
if (running)
return (accumulated + timestamp() - last_clock) * 1000.;
return (accumulated * 1000.);
}
double timer::useconds()
{
if (running)
return (accumulated + timestamp() - last_clock) * 1000000.;
return (accumulated * 1000000.);
}
double timer::seconds()
{
if (running)
return (accumulated + timestamp() - last_clock);
return (accumulated);
}
__STXXL_END_NAMESPACE
#endif // !STXXL_TIMER_HEADER
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