home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Geek Gadgets 1
/
ADE-1.bin
/
ade-dist
/
gnat-2.06-src.tgz
/
tar.out
/
fsf
/
gnat
/
ada
/
s-pooglo.adb
< prev
next >
Wrap
Text File
|
1996-09-28
|
4KB
|
103 lines
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . P O O L _ G L O B A L --
-- --
-- B o d y --
-- --
-- $Revision: 1.4 $ --
-- --
-- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
-- --
-- The GNAT library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU Library General Public License as published by --
-- the Free Software Foundation; either version 2, or (at your option) any --
-- later version. The GNAT library is distributed in the hope that it will --
-- be useful, but WITHOUT ANY WARRANTY; without even the implied warranty --
-- of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- Library General Public License for more details. You should have --
-- received a copy of the GNU Library General Public License along with --
-- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
-- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
-- --
------------------------------------------------------------------------------
with System.Storage_Pools; use System.Storage_Pools;
with System.Storage_Elements; use System.Storage_Elements;
package body System.Pool_Global is
--------------------------
-- Imported C Functions --
--------------------------
-- It is assumed that these functions are self-protected against concurrent
-- access (should be true on a POSIX system with threads, and is part of
-- the interface requirement for the implementation of Tasking.Primitives)
function malloc (Size : Storage_Count) return System.Address;
pragma Import (C, malloc, "malloc");
procedure free (Address : System.Address);
pragma Import (C, free, "free");
------------------
-- Storage_Size --
------------------
function Storage_Size
(Pool : Unbounded_No_Reclaim_Pool)
return Storage_Count
is
begin
-- Intuitively, should return System.Memory_Size. But on Sun/Alsys,
-- System.Memory_Size > System.Max_Int, which means all you can do with
-- it is raise CONSTRAINT_ERROR...
return Storage_Count'Last;
end Storage_Size;
--------------
-- Allocate --
--------------
procedure Allocate
(Pool : in out Unbounded_No_Reclaim_Pool;
Address : out System.Address;
Storage_Size : Storage_Count;
Alignment : Storage_Count)
is
Allocated : System.Address;
begin
Allocated := malloc (Storage_Size);
-- The call to malloc returns an address whose alignment is compatible
-- with the worst case alignment requirement for the machine; thus the
-- Alignment argument can be safely ignored.
if Allocated = Null_Address then
raise Storage_Error;
else
Address := Allocated;
end if;
end Allocate;
----------------
-- Deallocate --
----------------
procedure Deallocate
(Pool : in out Unbounded_No_Reclaim_Pool;
Address : System.Address;
Storage_Size : Storage_Count;
Alignment : Storage_Count)
is
begin
free (Address);
end Deallocate;
end System.Pool_Global;