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lqtutils_freq.cpp
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lqtutils_freq.cpp
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/**
* MIT License
*
* Copyright (c) 2022 Luca Carlon
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
**/
#include <QTimer>
#include <QMutableListIterator>
#include "lqtutils_freq.h"
#define AUTO_REFRESH_INTERVAL 1000
namespace lqt {
FreqMeter::FreqMeter(QObject* parent) :
QObject(parent)
{
m_refreshTimer = new QTimer(this);
connect(m_refreshTimer, &QTimer::timeout,
this, &FreqMeter::refresh);
m_refreshTimer->setInterval(AUTO_REFRESH_INTERVAL);
m_refreshTimer->setSingleShot(true);
m_refreshTimer->start();
}
void FreqMeter::registerSample()
{
QMutexLocker locker(&m_mutex);
m_timestamps.append(QDateTime::currentDateTime());
QTimer::singleShot(0, this, &FreqMeter::refresh);
}
void FreqMeter::refresh()
{
QMutexLocker locker(&m_mutex);
QDateTime now = QDateTime::currentDateTime();
QMutableListIterator<QDateTime> it(m_timestamps);
while (it.hasNext()) {
if (it.next().msecsTo(now) > 1000)
it.remove();
else
break;
}
set_freq(m_timestamps.size());
m_refreshTimer->stop();
m_refreshTimer->start();
}
} // namesapce