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/*!
* \file
* \brief Definitions of Timing classes
* \author Thomas Eriksson, Tony Ottosson and Tobias Ringstrom
*
* -------------------------------------------------------------------------
*
* 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 TIMING_H
#define TIMING_H
namespace itpp {
/*!
\addtogroup timers
*/
/*!
\brief A virtual base class for timers.
\ingroup timers
*/
class Timer {
public:
//! Create a new timer. Sets the time to zero.
Timer();
//! Virtual destructor
virtual ~Timer() { }
//! Start the timer. This does not set the time to zero.
void start(void);
//! Stop the timer. Returns the elapsed time in seconds.
double stop(void);
//! Sets the time to time t, which is zero by default. Stops the timer if it is running.
void reset(double t=0.0);
//! Resets the timer and starts it.
void tic(void);
//! Returns the elapsed time since last tic()
double toc(void);
//! Prints the elapsed time since last tic()
void toc_print(void);
//! Returns the elapsed time.
double get_time() const;
protected:
//! Vitrual function that returns teh current time
virtual double get_current_time() const = 0;
//! The start time of the timer
double start_time;
//! The stop time of the timer
double stop_time;
//! The ellapsed time from start to stop
double elapsed_time;
//! A bool that indicates if the timer is running or not
bool running;
};
/*!
\brief A CPU time timer class
\ingroup timers
Measures the time spent by the CPU on the current process. If two processes
are running concurrently, one real seconds equal 5 CPU seconds per process.
The resolution is not very good (in the order of 0.01 seconds).
Usage: Define a time object:
\code
CPU_Timer timer;
\endcode
Actions:
Reset: \code timer.reset(); \endcode
Start: \code timer.start(); \endcode
Stop: \code timer.stop(); \endcode
Get time: \code elapsedtime = timer.get_time(); \endcode
It is possible to get elapsed time without stopping the timer.
Observe that it is also possible to use the macros "time.tic();"
to reset and start clock and "time.toc();" stop and print the elapsed time.
\warning May give an negative answer if the measured time is too long.
*/
class CPU_Timer : public Timer {
public:
//! Create a new timer. Sets the time to zero.
CPU_Timer() { }
protected:
//!
double get_current_time() const;
};
/*!
\brief A real time timer class
\ingroup timers
Measures real time.
Usage: Define a time object:
\code
Real_Timer timer;
\endcode
Actions:
Reset: \code timer.reset(); \endcode
Start: \code timer.start(); \endcode
Stop: \code timer.stop(); \endcode
Get time: \code elapsedtime = timer.get_time(); \endcode
It is possible to get elapsed time without stopping the timer.
Observe that it is also possible to use the macros "time.tic();"
to reset and start clock and "time.toc_print();" to print the elapsed time.
\warning May give an negative answer if the measured time is too long.
*/
class Real_Timer : public Timer {
public:
//! Create a new timer. Sets the time to zero.
Real_Timer() { }
protected:
//!
double get_current_time() const;
};
/*!
\brief Reset and start timer
\ingroup timers
*/
void tic();
/*!
\brief Returns the elapsed time since last tic()
\ingroup timers
*/
double toc();
/*!
\brief Prints the elapsed time since last tic()
\ingroup timers
*/
void toc_print();
/*!
\brief pause
\ingroup timers
\code pause(n); \endcode Pauses for n seconds before continuing
\code pause(); \endcode Pauses until a key is pressed
*/
void pause(double t=-1);
} // namespace itpp
#endif // #ifndef TIMING_H
|
