windows 系统资源获取的c++ 方法

1.  获取windows cpu  核个数

size_t getProcessorCores()
{
    DWORD process, system;
    if(GetProcessAffinityMask(GetCurrentProcess(), &process, &system))
    {
        int count = 0;
        for(int i = 0; i < 32; i++)
            if(system & (1 << i))
                count++;
        return count;
    }
    // may be we hav"t PROCESS_QUERY_INFORMATION access right
    SYSTEM_INFO sysinfo;
    GetSystemInfo( &sysinfo );
    return sysinfo.dwNumberOfProcessors;
}

size_t getAvailableProcessorCores()
{
    DWORD process, system;
    if(GetProcessAffinityMask(GetCurrentProcess(), &process, &system))
    {
        int count = 0;
        for(int i = 0; i < 32; i++)
            if(process & (1 << i))
                count++;
        return count;
    }
    // may be we hav"t PROCESS_QUERY_INFORMATION access right
    SYSTEM_INFO sysinfo;
    GetSystemInfo( &sysinfo );
    return sysinfo.dwNumberOfProcessors;
}