获取当前进程的CPU使用率和内存使用

int GetProcessInfo::GetProcessNumber()
{
SYSTEM_INFO info;
GetSystemInfo(&info);
return (int)info.dwNumberOfProcessors;
}

// 时间格式转换
__int64 GetProcessInfo::FileTimeToInt64(const FILETIME& time)
{
ULARGE_INTEGER tt;
tt.LowPart = time.dwLowDateTime;
tt.HighPart = time.dwHighDateTime;
return(tt.QuadPart);
}

double GetProcessInfo::get_cpu_usage()
{
//cpu数量
static int processor_count_ = -1;
//上一次的时间
static __int64 last_time_ = 0;
static __int64 last_system_time_ = 0;

FILETIME now;
FILETIME creation_time;
FILETIME exit_time;
FILETIME kernel_time;
FILETIME user_time;
__int64 system_time;
__int64 time;
// 	__int64 system_time_delta;
// 	__int64 time_delta;

double cpu = -1;

if(processor_count_ == -1)
{
processor_count_ = GetProcessNumber();
}

GetSystemTimeAsFileTime(&now);

HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION/*PROCESS_ALL_ACCESS*/, false, m_ProcessID);
if (!hProcess)
{
return -1;
}
if (!GetProcessTimes(hProcess, &creation_time, &exit_time, &kernel_time, &user_time))
{
return -1;
}
system_time = (FileTimeToInt64(kernel_time) + FileTimeToInt64(user_time)) / processor_count_;  //CPU使用时间
time = FileTimeToInt64(now);		//现在的时间

last_system_time_ = system_time;
last_time_ = time;
CloseHandle( hProcess );

Sleep(1000);

hProcess = OpenProcess(PROCESS_QUERY_INFORMATION/*PROCESS_ALL_ACCESS*/, false, m_ProcessID);
if (!hProcess)
{
return -1;
}
if (!GetProcessTimes(hProcess, &creation_time, &exit_time, &kernel_time, &user_time))
{
return -1;
}
GetSystemTimeAsFileTime(&now);
system_time = (FileTimeToInt64(kernel_time) + FileTimeToInt64(user_time)) / processor_count_;  //CPU使用时间
time = FileTimeToInt64(now);		//现在的时间

CloseHandle( hProcess );

cpu = ((double)(system_time - last_system_time_) / (double)(time - last_time_)) * 100;
return cpu;
}

void GetProcessInfo::PrintMemoryInfo()
{
HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;
DWORD dwPriorityClass;
int memoryInK;

SYSTEMTIME nowtime;
GetLocalTime(&nowtime);
CString nowdata = _T("");
nowdata.Format(_T("%d:%d"), nowtime.wHour,nowtime.wMinute);

// 获得m_ProcessID的句柄
hProcess = OpenProcess(
PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, m_ProcessID );

CString AppName;
AppName.Format(_T("memory-%s"), nowdata);
if (NULL == hProcess)
{
WritePrivateProfileString(AppName, m_ProcessName, _T("Can't Open The Process"), m_Address_ini);
return;
}

dwPriorityClass = 0;
dwPriorityClass = GetPriorityClass( hProcess );
if( !dwPriorityClass )
{
WritePrivateProfileString(AppName, m_ProcessName, _T("GetPriorityClass"), m_Address_ini);
return;
}

if (GetProcessMemoryInfo( hProcess, &pmc, sizeof(pmc)) )
{

memoryInK = pmc.WorkingSetSize/1024;		//单位为k
CString memory;
memory.Format(_T("%d"), memoryInK);
WritePrivateProfileString(AppName, m_ProcessName, memory, m_Address_ini);
}

CloseHandle( hProcess );
}