Win32 API FAQ
Страница 13.

22)---------------------------------------------------------------------------

Q> Как в мультипроцессорной системе указать задаче на каком процессоре работать?

A>

           HANDLE threadHandle = GetCurrentThread();
           SetThreadIdealProcessor(threadHandle, 1);

23)---------------------------------------------------------------------------

    Q> Как установить (узнать) приоритет процесса?

    A>

{
           HANDLE procHandle = GetCurrentProcess();
           if (!SetPriorityClass(procHandle, HIGH_PRIORITY_CLASS))
                   RET_ERR("SetPriorityClass");

           DWORD priorityClass = GetPriorityClass(procHandle);
           ADD_STR("Priority Class is set to : ");
           switch(priorityClass)
           {
           case HIGH_PRIORITY_CLASS:
                   ADD_STR("HIGH_PRIORITY_CLASS\r\n");
                   break;
           case IDLE_PRIORITY_CLASS:
                   ADD_STR("IDLE_PRIORITY_CLASS\r\n");
                   break;
           case NORMAL_PRIORITY_CLASS:
                   ADD_STR("NORMAL_PRIORITY_CLASS\r\n");
                   break;
           case REALTIME_PRIORITY_CLASS:
                   ADD_STR("REALTIME_PRIORITY_CLASS\r\n");
                   break;
           default:
                   ADD_STR("Unknown priority class\r\n");
           }
           return result_buffer;
}

24)---------------------------------------------------------------------------

    Q> Как установить (узнать) приоритет нити?

    A>

{
           HANDLE threadHandle = GetCurrentThread();
           if (!SetThreadPriority(threadHandle, THREAD_PRIORITY_HIGHEST))
                   RET_ERR("SetThreadPriority");

           int priority = GetThreadPriority(threadHandle);
           if (priority == THREAD_PRIORITY_ERROR_RETURN)
                   RET_ERR("GetThreadPriority");
           switch (priority)
           {
           case THREAD_PRIORITY_ABOVE_NORMAL:
                   ADD_STR("THREAD_PRIORITY_ABOVE_NORMAL\r\n");
                           break;
           case THREAD_PRIORITY_BELOW_NORMAL:
                   ADD_STR("THREAD_PRIORITY_BELOW_NORMAL\r\n");
                           break;
           case THREAD_PRIORITY_HIGHEST:
                   ADD_STR("THREAD_PRIORITY_HIGHEST\r\n");
                           break;
           case THREAD_PRIORITY_IDLE:
                   ADD_STR("THREAD_PRIORITY_IDLE\r\n");
                           break;
           case THREAD_PRIORITY_LOWEST:
                   ADD_STR("THREAD_PRIORITY_LOWEST\r\n");
                           break;
           case THREAD_PRIORITY_NORMAL:
                   ADD_STR("THREAD_PRIORITY_NORMAL\r\n");
                           break;
           case THREAD_PRIORITY_TIME_CRITICAL:
                   ADD_STR("THREAD_PRIORITY_TIME_CRITICAL\r\n");
                           break;
           default:
                   ADD_STR("Unknown\r\n");
           }
           return result_buffer;}

25)---------------------------------------------------------------------------

    Q> Как определить тип NT - server или workstation?

    A> Через регистри -

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\ProductOptions

Значение "Product Type". Три возможных варианта :

"WinNT" workstation
"ServerNT" server
"LanmanNT" domain controller

26)--------------------------------------------------------------------------

Q> Как проследить чтобы только одна копия приложения работала в данный момент

A>

BOOL WeAreAlone (LPSTR szName)
{
      HANDLE hMutex = CreateMutex (NULL, TRUE, szName);
      if (GetLastError() == ERROR_ALREADY_EXISTS)
      {
         CloseHandle(hMutex);
         return FALSE;
      }
      return TRUE;
}

И в начале WinMain или main -

if (WeAreAlone ("Some_Unique_Name_Or_Other"))
{
      // Proceed
}
else
{
      MessageBox (NULL,"Error","Error: app already running!",MB_OK|MB_ICONERROR);
      exit(1);
}