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- ------------------------------------------------------------------------------
- -- --
- -- 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;
-