156 lines
2.9 KiB
C++
156 lines
2.9 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "stdmisc.h"
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#include "nel/misc/stop_watch.h"
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using namespace std;
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#ifdef DEBUG_NEW
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#define new DEBUG_NEW
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#endif
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namespace NLMISC {
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/*
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* Constructor
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*/
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CStopWatch::CStopWatch( uint queueLength ) :
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_BeginTime( 0 ),
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_ElapsedTicks( 0 ),
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_SumTicks( 0 ),
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_MeasurementNumber( 0 ),
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_Queue(),
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_QLength( queueLength )
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{}
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/*
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* Begin measurement
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*/
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void CStopWatch::start()
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{
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_BeginTime = CTime::getPerformanceTime();
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_ElapsedTicks = 0;
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}
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/*
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* Pause
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*/
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void CStopWatch::pause()
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{
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_ElapsedTicks += (TTickDuration)(CTime::getPerformanceTime() - _BeginTime);
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}
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/*
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* Resume
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*/
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void CStopWatch::resume()
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{
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_BeginTime = CTime::getPerformanceTime();
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}
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/*
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* Add time (in TTicks unit) to the current measurement
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*/
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void CStopWatch::addTime( TTickDuration t )
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{
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_ElapsedTicks += t;
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}
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/*
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* End measurement
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*/
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void CStopWatch::stop()
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{
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_ElapsedTicks += (TTickDuration)(CTime::getPerformanceTime() - _BeginTime);
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// Setup average
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_SumTicks += _ElapsedTicks;
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++_MeasurementNumber;
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// Setup partial average
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if ( _QLength != 0 )
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{
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_Queue.push_back( _ElapsedTicks );
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if ( _Queue.size() > _QLength )
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{
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_Queue.pop_front();
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}
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}
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}
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/*
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* Add an external duration (in TTicks unit) to the average queue
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*/
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void CStopWatch::addMeasurement( TTickDuration t )
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{
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// Setup average
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_SumTicks += t;
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++_MeasurementNumber;
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// Setup partial average
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if ( _QLength != 0 )
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{
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_Queue.push_back( t );
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if ( _Queue.size() > _QLength )
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{
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_Queue.pop_front();
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}
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}
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}
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/*
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* Elapsed time in millisecond (call it after stop())
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*/
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TMsDuration CStopWatch::getDuration() const
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{
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return (TMsDuration)(CTime::ticksToSecond( _ElapsedTicks ) * 1000.0);
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}
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/*
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* Average of the queueLength last durations (using the queueLength argument specified in the constructor)
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*/
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TMsDuration CStopWatch::getPartialAverage() const
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{
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if (_Queue.empty())
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return (TMsDuration)0;
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else
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return (TMsDuration)(CTime::ticksToSecond( accumulate( _Queue.begin(), _Queue.end(), 0 ) / _Queue.size() ) * 1000.0);
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}
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/*
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* Average of the duration
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*/
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TMsDuration CStopWatch::getAverageDuration() const
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{
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return (TMsDuration)(CTime::ticksToSecond( _SumTicks / _MeasurementNumber ) * 1000.0);
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}
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} // NLMISC
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