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/*
Copyright (C) 1998, 1999, 2000, 2007 John Anderson
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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 Library 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.
*/
#ifndef timer_h
#define timer_h
#ifdef _WIN32
#include "windows.h"
#else
#include <sys/time.h>
#endif
namespace Mackie
{
/**
millisecond timer class.
*/
class Timer
{
public:
/**
start the timer running if true, or just create the
object if false.
*/
Timer( bool shouldStart = true )
{
if ( shouldStart )
start();
}
/**
Start the timer running. Return the current timestamp, in milliseconds
*/
unsigned long start()
{
#ifdef _WIN32
_start = (unsigned long)::GetTickCount();
#else
gettimeofday ( &_start, 0 );
#endif
running = true;
#ifdef _WIN32
return _start;
#else
return ( _start.tv_sec * 1000000 + _start.tv_usec ) / 1000;
#endif
}
/**
returns the number of milliseconds since start
also stops the timer running
*/
unsigned long stop()
{
#ifdef _WIN32
_stop = (unsigned long)::GetTickCount();
#else
gettimeofday ( &_stop, 0 );
#endif
running = false;
return elapsed();
}
/**
returns the number of milliseconds since start
*/
unsigned long elapsed() const
{
if ( running )
{
#ifdef _WIN32
DWORD current = ::GetTickCount();
return current - _start;
#else
struct timeval current;
gettimeofday ( ¤t, 0 );
return (
( current.tv_sec * 1000000 + current.tv_usec ) - ( _start.tv_sec * 1000000 + _start.tv_usec )
) / 1000
;
#endif
}
else
{
#ifdef _WIN32
return _stop - _start;
#else
return (
( _stop.tv_sec * 1000000 + _stop.tv_usec ) - ( _start.tv_sec * 1000000 + _start.tv_usec )
) / 1000
;
#endif
}
}
/**
Call stop and then start. Return the value from stop.
*/
unsigned long restart()
{
unsigned long retval = stop();
start();
return retval;
}
private:
#ifdef _WIN32
unsigned long _start;
unsigned long _stop;
#else
struct timeval _start;
struct timeval _stop;
#endif
bool running;
};
}
#endif
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