SetPriorityClass

SetPriorityClass - a function that sets the priority class for a specified process. This function is specific to Windows.

The SetPriorityClass may have one of the following priority classes:

• HIGH_PRIORITY_CLASS <= High performs tasks immediately.\
• IDLE_PRIORITY_CLASS <= Idle performs tasks when the system is idle.\
• NORMAL_PRIORITY_CLASS <= Normal performs tasks at regular speed.\
• REALTIME_PRIORITY_CLASS <= Real Time performs tasks immediately and above all other tasks, including operating system tasks.

Use caution when using REALTIME_PRIORITY_CLASS. It can potentially take so much of the CPU resources that there may not be anything left for other items to run, including operating system requests.

EXAMPLE:

uses Windows; // Unit containing the SetPriorityClass function.

procedure TForm1.FormCreate(Sender: TObject);
begin
     SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS);
     // Sets the current running application to High Priority.
end;

From the Free Pascal wiki, page "SetPriorityClass", as it stood on 2020-02-26 after a change by Trev, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's Licensing page. If you have concerns about this material, message the admin.