VC代码获取CPU利用率等系统属性

// NetCtl.cpp : implementation file // #include "stdafx.h" #include "CNetControl.h" #include "CpuUsgesCtl.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CCpuUsgesCtl #define SystemBasicInformation 0 #define SystemPerformanceInformation 2 #define SystemTimeInformation 3 #define Li2Double(x) ((double)((x).HighPart) * 4.294967296E9 + (double)((x).LowPart)) typedef struct { DWORD dwUnknown1; ULONG uKeMaximumIncrement; ULONG uPageSize; ULONG uMmNumberOfPhysicalPages; ULONG uMmLowestPhysicalPage; ULONG uMmHighestPhysicalPage; ULONG uAllocationGranularity; PVOID pLowestUserAddress; PVOID pMmHighestUserAddress; ULONG uKeActiveProcessors; BYTE bKeNumberProcessors; BYTE bUnknown2; WORD wUnknown3; } SYSTEM_BASIC_INFORMATION; typedef struct { LARGE_INTEGER liIdleTime; DWORD dwSpare[76]; } SYSTEM_PERFORMANCE_INFORMATION; typedef struct { LARGE_INTEGER liKeBootTime; LARGE_INTEGER liKeSystemTime; LARGE_INTEGER liExpTimeZoneBias; ULONG uCurrentTimeZoneId; DWORD dwReserved; } SYSTEM_TIME_INFORMATION; CCpuUsgesCtl::CCpuUsgesCtl() { m_iRefreshInterval = 10; m_fNewUsges = 40; m_ForeFontColor = RGB(255, 0, 0); m_ForeColor = RGB(0, 150, 0); m_BackColor = RGB(0, 0, 0); m_FreeColor = RGB(0, 80, 0); m_UsedColor = RGB(0, 140, 0); m_LableColor = RGB(255, 255, 0); m_iGridHeight = 0; m_iGridCount = 50; m_liOldIdleTime.QuadPart = 0; m_liOldSystemTime.QuadPart = 0; } CCpuUsgesCtl::~CCpuUsgesCtl() { } BEGIN_MESSAGE_MAP(CCpuUsgesCtl, CWnd) //{{AFX_MSG_MAP(CCpuUsgesCtl) ON_WM_PAINT() ON_WM_CREATE() ON_WM_TIMER() ON_WM_SIZE() ON_WM_SHOWWINDOW() ON_WM_ERASEBKGND() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CCpuUsgesCtl message handlers void CCpuUsgesCtl::OnPaint() { DrawCpuUsges(); CPaintDC dc(this); } int CCpuUsgesCtl::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CWnd::OnCreate(lpCreateStruct) == -1) return -1; return 0; } void CCpuUsgesCtl::GetCpuUsgesNt() { SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo; SYSTEM_TIME_INFORMATION SysTimeInfo; SYSTEM_BASIC_INFORMATION SysBaseInfo; double dbIdleTime; double dbSystemTime; LONG status; typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG); PROCNTQSI NtQuerySystemInformation; NtQuerySystemInformation = (PROCNTQSI)GetProcAddress( GetModuleHandle("ntdll"), "NtQuerySystemInformation" ); if (!NtQuerySystemInformation) { return; } // get number of processors in the system status = NtQuerySystemInformation(SystemBasicInformation, &SysBaseInfo,sizeof(SysBaseInfo),NULL); if (status != NO_ERROR) { return; } status = NtQuerySystemInformation(SystemTimeInformation, &SysTimeInfo,sizeof(SysTimeInfo),0); if (status!=NO_ERROR) { return; } // get new CPU's idle time status = NtQuerySystemInformation(SystemPerformanceInformation, &SysPerfInfo,sizeof(SysPerfInfo),NULL); if (status != NO_ERROR) { return; } // if it's a first call - skip it if (m_liOldIdleTime.QuadPart != 0) { // CurrentValue = NewValue - OldValue dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) - Li2Double(m_liOldIdleTime); dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) - Li2Double(m_liOldSystemTime); // CurrentCpuIdle = IdleTime / SystemTime dbIdleTime = dbIdleTime / dbSystemTime; // CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) / NumberOfProcessors dbIdleTime = 100.0 - dbIdleTime * 100.0 / (double)SysBaseInfo.bKeNumberProcessors + 0.5; m_fNewUsges = (UINT)dbIdleTime; } // store new CPU's idle and system time m_liOldIdleTime = SysPerfInfo.liIdleTime; m_liOldSystemTime = SysTimeInfo.liKeSystemTime; } void CCpuUsgesCtl::SetRefreshInterval(int iMs) { m_iRefreshInterval = iMs; SetTimer(1, m_iRefreshInterval, NULL); } void CCpuUsgesCtl::OnTimer(UINT nIDEvent) { if(IsNt()) { GetCpuUsgesNt(); } else { GetCpuUsges9X(); } Invalidate(); CWnd::OnTimer(nIDEvent); } void CCpuUsgesCtl::SetGridCount(int iNewCounts) { m_iGridCount = iNewCounts; } void CCpuUsgesCtl::SetGridHeight(int iNewHeight) { m_iGridHeight = iNewHeight; } void CCpuUsgesCtl::OnSize(UINT nType, int cx, int cy) { CWnd::OnSize(nType, cx, cy); } void CCpuUsgesCtl::OnShowWindow(BOOL bShow, UINT nStatus) { CWnd::OnShowWindow(bShow, nStatus); } void CCpuUsgesCtl::GetCpuUsges9X() { HKEY hkey; DWORD dwDataSize; DWORD dwType; DWORD dwCpuUsage; // starting the counter if ( RegOpenKeyEx( HKEY_DYN_DATA, "PerfStats\\StartStat", 0,KEY_ALL_ACCESS, &hkey ) != ERROR_SUCCESS ) { return; } dwDataSize=sizeof(DWORD); RegQueryValueEx( hkey, "KERNEL\\CPUUsage", NULL,&dwType, (LPBYTE)&dwCpuUsage, &dwDataSize ); RegCloseKey(hkey); // geting current counter's value if ( RegOpenKeyEx( HKEY_DYN_DATA, "PerfStats\\StatData", 0,KEY_READ, &hkey ) != ERROR_SUCCESS) { return; } dwDataSize=sizeof(DWORD); RegQueryValueEx( hkey, "KERNEL\\CPUUsage", NULL,&dwType, (LPBYTE)&dwCpuUsage, &dwDataSize ); m_fNewUsges = dwCpuUsage; RegCloseKey(hkey); // stoping the counter if ( RegOpenKeyEx( HKEY_DYN_DATA, "PerfStats\\StopStat", 0,KEY_ALL_ACCESS, &hkey ) != ERROR_SUCCESS) { return; } dwDataSize=sizeof(DWORD); RegQueryValueEx( hkey, "KERNEL\\CPUUsage", NULL,&dwType, (LPBYTE)&dwCpuUsage, &dwDataSize ); RegCloseKey(hkey); } BOOL CCpuUsgesCtl::IsNt() { DWORD winVer; winVer = GetVersion(); if(winVer<0x80000000) { return TRUE; } return FALSE; } void CCpuUsgesCtl::DrawCpuUsges() { CDC memDC; CString strLable; CBitmap memBitmap; CBitmap* pOldBmp = NULL; CString strUsges; CPen BackFreePen; CPen BackUsedPen; CPen *pOldPen = NULL; CPen *pOldMemPen = NULL; CRect rectClient; CPaintDC dc(this); GetClientRect(&rectClient); m_iGridHeight = rectClient.Height() / m_iGridCount; //draw cpu free usges BackFreePen.CreatePen(PS_SOLID, m_iGridHeight - 2, m_FreeColor); memDC.CreateCompatibleDC(&dc); pOldMemPen = memDC.SelectObject(&BackFreePen); memBitmap.CreateCompatibleBitmap(&dc, rectClient.right, rectClient.bottom); pOldBmp = memDC.SelectObject(&memBitmap); memDC.FillSolidRect(rectClient, m_BackColor); for(int i = 0; i < 50 - (int)(m_fNewUsges / 2); i ++) { memDC.MoveTo(rectClient.left + 12, rectClient.top + i * m_iGridHeight + 12); memDC.LineTo(rectClient.right - 12, rectClient.top + i * m_iGridHeight + 12