How to determine the hardware (CPU and RAM) on a machine?

Question

I\'m working on a cross platform profiling suite, and would like to add information about the machine\'s CPU (architecture/clock speed/cores) and RAM(total) to the report of

Answer 1

On Windows to determine CPU clock speed:

double CPUSpeed()
{
    wchar_t Buffer[_MAX_PATH];
    DWORD BufSize = _MAX_PATH;
    DWORD dwMHz = _MAX_PATH;
    HKEY hKey;

    // open the key where the proc speed is hidden:
    long lError = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
                                L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",
                                0,
                                KEY_READ,
                                &hKey);
    if(lError != ERROR_SUCCESS)
    {// if the key is not found, tell the user why:
        FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
                        NULL,
                        lError,
                        0,
                        Buffer,
                        _MAX_PATH,
                        0);
        wprintf(Buffer);
        return 0;
    }

    // query the key:
    RegQueryValueEx(hKey, L"~MHz", NULL, NULL, (LPBYTE) &dwMHz, &BufSize);
    return (double)dwMHz;
}