QT取得システムメモリ使用率、CPU使用率、ハードディスク容量(windows、linuxともに利用可能)
7980 ワード
システムリソースを取得するクラスを書き、マクロ定義でlinux下とwindows下でそれぞれ異なるコードを実行することを区別しました.ヘッダファイル:
ソースファイル:
#ifndef RESOURCE_MINITOR_H
#define RESOURCE_MINITOR_H
#include
#include
#include
#include
#include
#if defined(Q_OS_LINUX)
#include "sys/statfs.h"
#else
#pragma comment(lib,"Kernel32.lib")
#pragma comment(lib,"Psapi.lib")
#include
#include
#include
#include
#include
//#include
#include
#include
#endif
class MySysInfo : public QObject
{
Q_OBJECT
public:
explicit MySysInfo(QObject *parent = nullptr);
private slots:
void GetResource();
public:
bool GetMemUsage(double &nMemTotal,double &nMemUsed);
bool GetNetUsage();
bool GetDiskSpeed();
bool GetCpuUsage(double &nCpuRate);
bool GetdiskSpace(unsigned long &lFreeAll,unsigned long &lTotalAll);
bool GetPathSpace(const QString & path);
private:
const int m_timer_interval__ = 1000;
QTimer monitor_timer__;
double m_send_bytes__ = 0;
double m_recv_bytes__ = 0;
double m_disk_read__ = 0;
double m_disk_write__ = 0;
double m_cpu_total__ = 0;
double m_cpu_use__ = 0;
};
#endif // RESOURCE_MINITOR_H
ソースファイル:
#include "mysysinfo.h"
MySysInfo::MySysInfo(QObject *parent) : QObject(parent)
{
connect(&monitor_timer__, &QTimer::timeout, this, &MySysInfo::GetResource);
monitor_timer__.start(m_timer_interval__);
}
void MySysInfo::GetResource()
{
double nCpuRate = 0;
GetCpuUsage(nCpuRate);
GetDiskSpeed();
double nMemTotal;
double nMemUsed;
GetMemUsage(nMemTotal,nMemUsed);
GetNetUsage();
unsigned long lFreeAll;
unsigned long lTotalAll;
GetdiskSpace(lFreeAll,lTotalAll);
GetPathSpace("/");
qDebug()< 6)
{
qDebug("mem total:%.0lfMB free:%.0lfMB",lst[1].toDouble(),lst[6].toDouble());
nMemTotal = lst[1].toDouble();
nMemUsed = nMemTotal-lst[6].toDouble();
return true;
}
else
{
return false;
}
#else
MEMORYSTATUSEX memsStat;
memsStat.dwLength = sizeof(memsStat);
if(!GlobalMemoryStatusEx(&memsStat))// ,
{
return false;
}
double nMemFree = memsStat.ullAvailPhys/( 1024.0*1024.0 );
nMemTotal = memsStat.ullTotalPhys/( 1024.0*1024.0 );
nMemUsed= nMemTotal- nMemFree;
qDebug("windows:mem total:%.0lfMB,use:%.0lfMB",nMemTotal,nMemUsed);
return true;
#endif
}
bool MySysInfo::GetNetUsage()
{
#if defined(Q_OS_LINUX)
QProcess process;
process.start("cat /proc/net/dev"); // /proc/net/dev ,
process.waitForFinished();
process.readLine();
process.readLine();
while(!process.atEnd())
{
QString str = process.readLine();
str.replace("
","");
str.replace(QRegExp("( ){1,}")," ");
auto lst = str.split(" ");
if(lst.size() > 9 && lst[0] == "enp2s0:")
{
double recv = 0;
double send = 0;
if(lst.size() > 1)
recv = lst[1].toDouble();
if(lst.size() > 9)
send = lst[9].toDouble();
qDebug("%s :%.0lfbyte/s :%.0lfbyte/s",lst[0].toStdString().c_str(),(recv - m_recv_bytes__) / (m_timer_interval__ / 1000.0),(send - m_send_bytes__) / (m_timer_interval__ / 1000.0));
m_recv_bytes__ = recv;
m_send_bytes__ = send;
}
}
#endif
return true;
}
#if defined(Q_OS_WIN32)
__int64 Filetime2Int64(const FILETIME* ftime)
{
LARGE_INTEGER li;
li.LowPart = ftime->dwLowDateTime;
li.HighPart = ftime->dwHighDateTime;
return li.QuadPart;
}
__int64 CompareFileTime(FILETIME preTime,FILETIME nowTime)
{
return Filetime2Int64(&nowTime) - Filetime2Int64(&preTime);
}
#endif
bool MySysInfo::GetCpuUsage(double &nCpuRate)
{
nCpuRate = -1;
#if defined(Q_OS_LINUX)
QProcess process;
process.start("cat /proc/stat");
process.waitForFinished();
QString str = process.readLine();
str.replace("
","");
str.replace(QRegExp("( ){1,}")," ");
auto lst = str.split(" ");
if(lst.size() > 3)
{
double use = lst[1].toDouble() + lst[2].toDouble() + lst[3].toDouble();
double total = 0;
for(int i = 1;i < lst.size();++i)
total += lst[i].toDouble();
if(total - m_cpu_total__ > 0)
{
qDebug("cpu rate:%.2lf%%",(use - m_cpu_use__) / (total - m_cpu_total__) * 100.0);
m_cpu_total__ = total;
m_cpu_use__ = use;
nCpuRate = (use - m_cpu_use__) / (total - m_cpu_total__) * 100.0;
return true;
}
}
#else
HANDLE hEvent;
bool res;
static FILETIME preIdleTime;
static FILETIME preKernelTime;
static FILETIME preUserTime;
FILETIME idleTime;
FILETIME kernelTime;
FILETIME userTime;
res = GetSystemTimes(&idleTime,&kernelTime,&userTime);
preIdleTime = idleTime;
preKernelTime = kernelTime;
preUserTime = userTime;
hEvent = CreateEvent(nullptr,FALSE,FALSE,nullptr);// nonsignaled
WaitForSingleObject(hEvent,500);// 500
res = GetSystemTimes(&idleTime,&kernelTime,&userTime);
long long idle = CompareFileTime(preIdleTime,idleTime);
long long kernel = CompareFileTime(preKernelTime,kernelTime);
long long user = CompareFileTime(preUserTime,userTime);
nCpuRate =ceil( 100.0*( kernel + user - idle ) / ( kernel + user ) );
qDebug()< 5)
{
qDebug("disk read:%.0lfkb/s disk write:%.0lfkb/s",(lst[4].toDouble() - m_disk_read__ ) / (m_timer_interval__ / 1000.0),(lst[5].toDouble() - m_disk_write__) / (m_timer_interval__ / 1000.0));
m_disk_read__ = lst[4].toDouble();
m_disk_write__ = lst[5].toDouble();
return true;
}
#endif
return false;
}
bool MySysInfo::GetdiskSpace(unsigned long &lFreeAll,unsigned long &lTotalAll)
{
#if defined(Q_OS_LINUX)
QProcess process;
process.start("df -k");
process.waitForFinished();
process.readLine();
while(!process.atEnd())
{
QString str = process.readLine();
if(str.startsWith("/dev/sda"))
{
str.replace("
","");
str.replace(QRegExp("( ){1,}")," ");
auto lst = str.split(" ");
if(lst.size() > 5)
qDebug(" :%s :%.0lfMB :%.0lfMB",lst[5].toStdString().c_str(),lst[2].toDouble()/1024.0,lst[3].toDouble()/1024.0);
lFreeAll += lst[2].toDouble()/1024.0;
lTotalAll += lst[3].toDouble()/1024.0+lFreeAll;
}
}
#else
static char path[_MAX_PATH];//
int curdrive = _getdrive();
lFreeAll = 0UL;
lTotalAll = 0UL;
for(int drive = 1; drive <= curdrive; drive++ )//
{
if( !_chdrive( drive ) )
{
sprintf(path, "%c:\\", drive + 'A' - 1 );
ULARGE_INTEGER caller, total, free;
WCHAR wszClassName[_MAX_PATH];
memset(wszClassName,0,sizeof(wszClassName));
MultiByteToWideChar(CP_ACP,0,path,strlen(path)+1,wszClassName,
sizeof(wszClassName)/sizeof(wszClassName[0]));
if (GetDiskFreeSpaceEx(wszClassName, &caller, &total, &free) == 0)
{
qDebug()<