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/* BEGIN_COMMON_COPYRIGHT_HEADER
* (c)LGPL2+
**
** SysStat is a Qt-based interface to system statistics
**
** Authors:
** Copyright (c) 2009 - 2012 Kuzma Shapran <Kuzma.Shapran@gmail.com>
**
** This library is free software; you can redistribute it and/or
** modify it under the terms of the GNU Lesser General Public
** License as published by the Free Software Foundation; either
** version 2.1 of the License, or (at your option) any later version.
**
** This library 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
** Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public
** License along with this library;
** if not, write to the Free Software Foundation, Inc.,
** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
**
** END_COMMON_COPYRIGHT_HEADER */
#include "memstat.h"
#include "memstat_p.h"
namespace SysStat {
MemStatPrivate::MemStatPrivate(MemStat *parent)
: BaseStatPrivate(parent)
{
mSource = defaultSource();
connect(mTimer, SIGNAL(timeout()), SLOT(timeout()));
mSources << QLatin1String("memory") << QLatin1String("swap");
}
MemStatPrivate::~MemStatPrivate() = default;
void MemStatPrivate::timeout()
{
qulonglong memTotal = 0;
qulonglong memFree = 0;
qulonglong memBuffers = 0;
qulonglong memCached = 0;
qulonglong swapTotal = 0;
qulonglong swapFree = 0;
const QStringList rows = readAllFile("/proc/meminfo").split(QLatin1Char('\n'), Qt::SkipEmptyParts);
for (const QString &row : rows)
{
QStringList tokens = row.split(QLatin1Char(' '), Qt::SkipEmptyParts);
if (tokens.size() != 3)
continue;
if (tokens[0] == QLatin1String("MemTotal:"))
memTotal = tokens[1].toULong();
else if(tokens[0] == QLatin1String("MemFree:"))
memFree = tokens[1].toULong();
else if(tokens[0] == QLatin1String("Buffers:"))
memBuffers = tokens[1].toULong();
else if(tokens[0] == QLatin1String("Cached:"))
memCached = tokens[1].toULong();
else if(tokens[0] == QLatin1String("SwapTotal:"))
swapTotal = tokens[1].toULong();
else if(tokens[0] == QLatin1String("SwapFree:"))
swapFree = tokens[1].toULong();
}
if (mSource == QLatin1String("memory"))
{
if (memTotal)
{
float memTotal_d = static_cast<float>(memTotal);
float applications_d = static_cast<float>(memTotal - memFree - memBuffers - memCached) / memTotal_d;
float buffers_d = static_cast<float>(memBuffers) / memTotal_d;
float cached_d = static_cast<float>(memCached) / memTotal_d;
emit memoryUpdate(applications_d, buffers_d, cached_d);
}
}
else if (mSource == QLatin1String("swap"))
{
if (swapTotal)
{
float swapUsed_d = static_cast<float>(swapTotal - swapFree) / static_cast<float>(swapTotal);
emit swapUpdate(swapUsed_d);
}
}
}
QString MemStatPrivate::defaultSource()
{
return QLatin1String("memory");
}
MemStat::MemStat(QObject *parent)
: BaseStat(parent)
{
impl = new MemStatPrivate(this);
baseimpl = impl;
connect(impl, SIGNAL(memoryUpdate(float,float,float)), this, SIGNAL(memoryUpdate(float,float,float)));
connect(impl, SIGNAL(swapUpdate(float)), this, SIGNAL(swapUpdate(float)));
}
MemStat::~MemStat() = default;
}
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