MaxAvail

Returns the size of the largest contiguous free block in the heap.

Declaration

function MaxAvail: Longint;

Target

Windows, Real, Protected

Remarks

Returns the larger of:

• the largest free blocks within the heap manager's sub-allocation space
• the Windows global heap

The value corresponds to the size of the largest dynamic variable that can be allocated at that time.

See Also

MemAvail

Sample Code

{FreeMem.PAS}
{Sample code for the FreeMem and GetMem procedures and the MaxAvail function.}

{ For Windows: }
{ uses WinCrt; }

type
  TFriendRec = record
                Name: string[30];
                Age : Byte;
              end;
var
  p: pointer;
begin
  if MaxAvail < SizeOf(TFriendRec) then
    Writeln('Not enough memory')
  else
  begin
    { Allocate memory on heap }
    GetMem(p, SizeOf(TFriendRec));
    { ...}
    { ...Use the memory... }
    { ...}
    { Then free it when done }
    FreeMem(p, SizeOf(TFriendRec));
  end;
end.