ch02-sysinfo/sysinfolinuximpl.cpp

// #include "sysinfolinuximpl.h"

//// #include <sys/sysinfo.h>
// #include <sys/types.h>

// SysInfoLinuxImpl::SysInfoLinuxImpl() : SysInfo(), mCpuLoadLastValues() {}

// void SysInfoLinuxImpl::init() { mCpuLoadLastValues = cpuRawData(); }

// double SysInfoLinuxImpl::cpuLoadAverage() {
//   QVector<qulonglong> firstSample = mCpuLoadLastValues;
//   QVector<qulonglong> secondSample = cpuRawData();
//   mCpuLoadLastValues = secondSample;
//   double overall = (secondSample[0] - firstSample[0]) +
//                    (secondSample[1] - firstSample[1]) +
//                    (secondSample[2] - firstSample[2]);
//   double total = overall + (secondSample[3] - firstSample[3]);
//   double percent = (overall / total) * 100.0;
//   return qBound(0.0, percent, 100.0);
// }

// double SysInfoLinuxImpl::memoryUsed() {
//   struct sysinfo memInfo;
//   sysinfo(&memInfo);
//   qulonglong totalMemory = memInfo.totalram;
//   totalMemory += memInfo.totalswap;
//   totalMemory *= memInfo.mem_unit;
//   qulonglong totalMemoryUsed = memInfo.totalram - memInfo.freeram;
//   totalMemoryUsed += memInfo.totalswap - memInfo.freeswap;
//   totalMemoryUsed *= memInfo.mem_unit;
//   double percent = (double)totalMemoryUsed / (double)totalMemory * 100.0;
//   return qBound(0.0, percent, 100.0);
// }

// QVector<qulonglong> SysInfoLinuxImpl::cpuRawData() {
//   QFile file("/proc/stat");
//   file.open(QIODevice::ReadOnly);
//   QByteArray line = file.readLine();
//   file.close();
//   qulonglong totalUser = 0, totalUserNice = 0, totalSystem = 0, totalIdle =
//   0; std::sscanf(line.data(), "cpu %llu %llu %llu %llu", &totalUser,
//               &totalUserNice, &totalSystem, &totalIdle);

//  QVector<qulonglong> rawData;
//  rawData.append(totalUser);
//  rawData.append(totalUserNice);
//  rawData.append(totalSystem);
//  rawData.append(totalIdle);

//  return rawData;
//}