Limit CPU usage >= Windows 8 (JOBOBJECT_CPU_RATE_CONTROL_INFORMATION)

jobobject.cpp

HANDLE hJob = CreateJobObject( NULL, NULL );

JOBOBJECT_CPU_RATE_CONTROL_INFORMATION cpuRateControlInformation;
ZeroMemory( &cpuRateControlInformation, sizeof( cpuRateControlInformation ) );

int cpuUsagePercent = 30;
cpuRateControlInformation.CpuRate = cpuUsagePercent * 100;
cpuRateControlInformation.ControlFlags = JOB_OBJECT_CPU_RATE_CONTROL_ENABLE | JOB_OBJECT_CPU_RATE_CONTROL_HARD_CAP;

if ( !SetInformationJobObject( hJob, JobObjectCpuRateControlInformation, &cpuRateControlInformation, sizeof( cpuRateControlInformation ) ) )
{
    printf( "SetInformationJobObject failed (%d)\n", GetLastError() );
    return 1;
}

if ( !AssignProcessToJobObject( hJob, GetCurrentProcess() ) )
{
    printf( "AssignProcessToJobObject failed (%d)\n", GetLastError() );
    return 1;
}

BOOL bInJob = FALSE;
IsProcessInJob( GetCurrentProcess(), NULL, &bInJob );
if ( bInJob )
{
    printf( "Process is in Job!\n" );
}

// make cpu load
for ( int i = 0; i < 20; i++ )
{
    std::thread( []() -> void {
        while ( 1 )
        {
            clock_t wakeup = clock() + 50;
            while ( clock() < wakeup ) {}
            Sleep( 50 );
        }
    } ).detach();
}

(void)getchar();
CloseHandle( hJob );