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// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2019 Luxoft Sweden AB
// Copyright (C) 2018 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "memorystatus.h"
using namespace Qt::StringLiterals;
/*!
\qmltype MemoryStatus
\inqmlmodule QtApplicationManager
\ingroup common-instantiatable
\brief Provides information on the status of the RAM.
MemoryStatus provides information on the status of the system's RAM (random-access memory).
Its property values are updated whenever the method update() is called.
You can use this component as a MonitorModel data source if you want to plot its previous
values over time.
\qml
import QtQuick
import QtApplicationManager
...
MonitorModel {
MemoryStatus {}
}
\endqml
You can also use it alongside a Timer for instance, when you're only interested in its current
value.
\qml
import QtQuick
import QtApplicationManager
...
MemoryStatus { id: memoryStatus }
Timer {
interval: 500
running: true
repeat: true
onTriggered: memoryStatus.update()
}
Text {
text: "memory used: " + (memoryStatus.memoryUsed / 1e6).toFixed(0) + " MB"
}
\endqml
*/
QT_USE_NAMESPACE_AM
MemoryStatus::MemoryStatus(QObject *parent)
: QObject(parent)
, m_memoryReader(new MemoryReader)
, m_memoryUsed(0)
{
}
/*!
\qmlproperty int MemoryStatus::totalMemory
\readonly
The total amount of physical memory (RAM) installed on the system in bytes.
\sa memoryUsed
*/
quint64 MemoryStatus::totalMemory() const
{
#if defined(Q_OS_LINUX)
auto limit = m_memoryReader->groupLimit();
if (limit > 0 && limit < m_memoryReader->totalValue())
return limit;
else
return m_memoryReader->totalValue();
#else
return m_memoryReader->totalValue();
#endif
}
/*!
\qmlproperty int MemoryStatus::memoryUsed
\readonly
The amount of physical memory (RAM) used in bytes.
The value of this property is updated when \l update is called.
\sa totalMemory
*/
quint64 MemoryStatus::memoryUsed() const
{
return m_memoryUsed;
}
/*!
\qmlproperty list<string> MemoryStatus::roleNames
\readonly
Names of the roles provided by MemoryStatus when used as a MonitorModel data source.
\sa MonitorModel
*/
QStringList MemoryStatus::roleNames() const
{
return { u"memoryUsed"_s };
}
/*!
\qmlmethod MemoryStatus::update
Updates the memoryUsed property.
\sa memoryUsed
*/
void MemoryStatus::update()
{
quint64 newReading = m_memoryReader->readUsedValue();
if (m_memoryUsed != newReading) {
m_memoryUsed = newReading;
emit memoryUsedChanged();
}
}
#include "moc_memorystatus.cpp"
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