VC++获取CPU使用率及信息

 

#include <StdAfx.h>
#include <windows.h>
#include <conio.h>
#include <stdio.h>

#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;

// ntdll!NtQuerySystemInformation (NT specific!)
//
// The function copies the system information of the
// specified type into a buffer
//
// NTSYSAPI
// NTSTATUS
// NTAPI
// NtQuerySystemInformation(
// IN UINT SystemInformationClass, // information type
// OUT PVOID SystemInformation, // pointer to buffer
// IN ULONG SystemInformationLength, // buffer size in bytes
// OUT PULONG ReturnLength OPTIONAL // pointer to a 32-bit
// // variable that receives
// // the number of bytes
// // written to the buffer
// );
typedef LONG (WINAPI *PROCNTQSI)(UINT,PVOID,ULONG,PULONG);

PROCNTQSI NtQuerySystemInformation;

void main(void)
{
SYSTEM_PERFORMANCE_INFORMATION SysPerfInfo;
SYSTEM_TIME_INFORMATION SysTimeInfo;
SYSTEM_BASIC_INFORMATION SysBaseInfo;
double dbIdleTime;
double dbSystemTime;
LONG status;
LARGE_INTEGER liOldIdleTime = {0,0};
LARGE_INTEGER liOldSystemTime = {0,0};

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;

printf("\nCPU Usage (press any key to exit): ");
while(!_kbhit())
{
// get new system time
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 (liOldIdleTime.QuadPart != 0)
{
// CurrentValue = NewValue - OldValue
dbIdleTime = Li2Double(SysPerfInfo.liIdleTime) -Li2Double(liOldIdleTime);
dbSystemTime = Li2Double(SysTimeInfo.liKeSystemTime) -

Li2Double(liOldSystemTime);

// CurrentCpuIdle = IdleTime / SystemTime
dbIdleTime = dbIdleTime / dbSystemTime;

// CurrentCpuUsage% = 100 - (CurrentCpuIdle * 100) /NumberOfProcessors
dbIdleTime = 100.0 - dbIdleTime * 100.0 /

(double)SysBaseInfo.bKeNumberProcessors + 0.5;

printf("\b\b\b\b=%%",(UINT)dbIdleTime);
}

// store new CPU's idle and system time
liOldIdleTime = SysPerfInfo.liIdleTime;
liOldSystemTime = SysTimeInfo.liKeSystemTime;

// wait one second
Sleep(1000);
}
printf("\n");
}

 

 

BOOL GetProcessorInfo(LPPROCESSOR_INFO lpProcessorInfo)

{

SYSTEM_INFO SystemInfo;

GetSystemInfo(&SystemInfo);

m_ProcessBaseInfo.dwNumberOfProcessors =SystemInfo.dwNumberOfProcessors;

m_ProcessBaseInfo.dwProcessorType =SystemInfo.dwProcessorType;

if(m_pProcessorOldTime == NULL)

{

m_pProcessorOldTime = newPROCESSORTIME_INFO[m_ProcessBaseInfo.dwNumberOfProcessors];

memset(m_pProcessorOldTime,0,sizeof(PROCESSORTIME_INFO) *m_ProcessBaseInfo.dwNumberOfProcessors);

}

memcpy(lpProcessorInfo,&m_ProcessBaseInfo,sizeof(m_ProcessBaseInfo));

return TRUE;

}

//内存的使用率

 

 

BOOL GetMemStatus(LPMEM_STATUS lpStatus)

{

MEMORYSTATUS state;

state.dwLength = sizeof(state);

GlobalMemoryStatus(&state);

memcpy(lpStatus,&(state.dwMemoryLoad),sizeof(MEM_STATUS));

return TRUE;

}