64 lines
1.3 KiB
Ada
64 lines
1.3 KiB
Ada
|
|
package body Unc_Memops is
|
|
|
|
use type System.Address;
|
|
|
|
type Addr_Array_T is array (1 .. 20) of Addr_T;
|
|
|
|
type Addr_Stack_T is record
|
|
Store : Addr_Array_T;
|
|
Size : Integer := 0;
|
|
end record;
|
|
|
|
procedure Push (Addr : Addr_T; As : access addr_stack_t) is
|
|
begin
|
|
As.Size := As.Size + 1;
|
|
As.Store (As.Size) := Addr;
|
|
end;
|
|
|
|
function Pop (As : access Addr_Stack_T) return Addr_T is
|
|
Addr : Addr_T := As.Store (As.Size);
|
|
begin
|
|
As.Size := As.Size - 1;
|
|
return Addr;
|
|
end;
|
|
|
|
--
|
|
|
|
Addr_Stack : aliased Addr_Stack_T;
|
|
Symetry_Expected : Boolean := False;
|
|
|
|
procedure Expect_Symetry (Status : Boolean) is
|
|
begin
|
|
Symetry_Expected := Status;
|
|
end;
|
|
|
|
function Alloc (Size : size_t) return Addr_T is
|
|
function malloc (Size : Size_T) return Addr_T;
|
|
pragma Import (C, Malloc, "malloc");
|
|
|
|
Ptr : Addr_T := malloc (Size);
|
|
begin
|
|
if Symetry_Expected then
|
|
Push (Ptr, Addr_Stack'Access);
|
|
end if;
|
|
return Ptr;
|
|
end;
|
|
|
|
procedure Free (Ptr : addr_t) is
|
|
begin
|
|
if Symetry_Expected
|
|
and then Ptr /= Pop (Addr_Stack'Access)
|
|
then
|
|
raise Program_Error;
|
|
end if;
|
|
end;
|
|
|
|
function Realloc (Ptr : addr_t; Size : size_t) return Addr_T is
|
|
begin
|
|
raise Program_Error;
|
|
return System.Null_Address;
|
|
end;
|
|
|
|
end;
|