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Memavail

Declaration:
Function Memavail : Longint;
Description:
Memavail returns the size, in bytes, of the free heap memory.

Remark: The heap grows dynamically if more memory is needed than is available. The heap size is not equal to the size of the memory available to the operating system, it is internal to the programs created by Free Pascal.

Errors:
None.
See also:
Maxavail (534),Freemem (504), Getmem (506)

Listing: refex/ex41.pp

Program Example41;

{ Program to demonstrate the MemAvail function. }

Var
  P, PP : Pointer;

begin
  GetMem (P,100);
  GetMem (PP,10000);
  FreeMem (P,100);
  { Due to the heap fragmentation introduced
    By the previous calls, the maximum amount of memory
    isn't equal to the maximum block size available. }
  Writeln ('Total heap available    (Bytes) : ',MemAvail);
  Writeln ('Largest block available (Bytes) : ',MaxAvail);
end.

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