How to determine CPU and memory consumption from inside a process?

Question

I once had the task of determining the following performance parameters from inside a running application:

• Total virtual memory available
• Virtual memo

Answer 1

I used this following code in my C++ project and it worked fine:

static HANDLE self;
static int numProcessors;
SYSTEM_INFO sysInfo;

double percent;

numProcessors = sysInfo.dwNumberOfProcessors;

//Getting system times information
FILETIME SysidleTime;
FILETIME SyskernelTime; 
FILETIME SysuserTime; 
ULARGE_INTEGER SyskernelTimeInt, SysuserTimeInt;
GetSystemTimes(&SysidleTime, &SyskernelTime, &SysuserTime);
memcpy(&SyskernelTimeInt, &SyskernelTime, sizeof(FILETIME));
memcpy(&SysuserTimeInt, &SysuserTime, sizeof(FILETIME));
__int64 denomenator = SysuserTimeInt.QuadPart + SyskernelTimeInt.QuadPart;  

//Getting process times information
FILETIME ProccreationTime, ProcexitTime, ProcKernelTime, ProcUserTime;
ULARGE_INTEGER ProccreationTimeInt, ProcexitTimeInt, ProcKernelTimeInt, ProcUserTimeInt;
GetProcessTimes(self, &ProccreationTime, &ProcexitTime, &ProcKernelTime, &ProcUserTime);
memcpy(&ProcKernelTimeInt, &ProcKernelTime, sizeof(FILETIME));
memcpy(&ProcUserTimeInt, &ProcUserTime, sizeof(FILETIME));
__int64 numerator = ProcUserTimeInt.QuadPart + ProcKernelTimeInt.QuadPart;
//QuadPart represents a 64-bit signed integer (ULARGE_INTEGER)

percent = 100*(numerator/denomenator);