File: ex39.pp

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Program Example39;

{ Program to demonstrate the Mark and Release functions. }

Var P,PP,PPP,MM : Pointer;

begin
  Getmem (P,100);
  Mark (MM);
  Writeln ('Getmem 100   : Memory available : ',MemAvail,' (marked)');
  GetMem (PP,1000);
  Writeln ('Getmem 1000  : Memory available : ',MemAvail);
  GetMem (PPP,100000);
  Writeln ('Getmem 10000 : Memory available : ',MemAvail);
  Release (MM);
  Writeln ('Released     : Memory available : ',MemAvail);    
  { At this point, PP and PPP are invalid ! }
end.