1 files changed, 55 insertions, 0 deletions
diff --git a/src/datasource/cpuload.cpp b/src/datasource/cpuload.cpp
new file mode 100644
index 0000000..48831f3
--- /dev/null
+++ b/src/datasource/cpuload.cpp
@@ -0,0 +1,55 @@
+#include "cpuload.h"
+#include <QStringList>
+
+CpuLoad::CpuLoad() :
+	_lastLoad(0),
+	_lastTotal(0),
+	_file("/proc/stat")
+{
+	// TODO Auto-generated constructor stub
+
+}
+
+CpuLoad::~CpuLoad() {
+	// TODO Auto-generated destructor stub
+}
+
+qint64 CpuLoad::read()
+{
+	static QChar space(' ');
+	if (!_file.open(QIODevice::ReadOnly)) {
+		return -1;
+	}
+	char buffer[500];
+	_file.readLine(buffer, sizeof(buffer));
+	_file.close();
+	QString line(buffer);
+	QStringList list = line.split(space, QString::SkipEmptyParts);
+	if (list.length() < 8) {
+		return -1;
+	}
+	// "cpu", user, nice, system, idle, iowait, irq, softirq
+	qint64 load = 0, total = 0;
+	for (int i = 1; i < 8; ++i) {
+		const qint64 value = list.at(i).toLongLong();
+		if (i < 4 || i > 5) {
+			load += value;
+		}
+		total += value;
+	}
+	const qint64 ret = ((load - _lastLoad) * 1000) / (total - _lastTotal);
+	_lastTotal = total;
+	_lastLoad = load;
+	return ret;
+}
+
+const QList<qint64>& CpuLoad::getBars() const
+{
+	static QList<qint64> list;
+	return list;
+}
+
+qint64 CpuLoad::getMaximum()
+{
+	return 1000;
+}