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-secsta.ads
< prev
next >
Wrap
Text File
|
1996-09-28
|
4KB
|
90 lines
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . S E C O N D A R Y _ S T A C K --
-- --
-- S p e c --
-- --
-- $Revision: 1.13 $ --
-- --
-- Copyright (c) 1992,1993,1994,1995 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_Elements;
with System.Storage_Pools;
package System.Secondary_Stack is
use System.Storage_Elements;
use System.Storage_Pools;
type Secondary_Stack_Pool is new Root_Storage_Pool with null record;
function Storage_Size (Pool : Secondary_Stack_Pool) return Storage_Count;
procedure Allocate
(Pool : in out Secondary_Stack_Pool;
Address : out System.Address;
Storage_Size : in Storage_Count;
Alignment : in Storage_Count);
procedure Deallocate
(Pool : in out Secondary_Stack_Pool;
Address : in System.Address;
Storage_Size : in Storage_Count;
Alignment : in Storage_Count);
type Mark_Id is private;
-- Type used to mark the stack.
procedure SS_Init (Stk : out Address; Size : Natural);
-- Initialize the secondary stack with a main stack of the given Size.
-- All further allocations which do not overflow the main stack will not
-- generate dynamic (de)allocation calls. If the main Stack overflows
-- a new chuck of at least the same size will be allocated and linked
-- to the previous chunk.
--
-- Note: the reason that Stk is passed is that SS_Init is called before
-- the proper interface is established to obtain the address of the
-- stack using System.Task_Specific_Data.Get_Sec_Stack_Addr.
procedure SS_Free (Stk : Address);
-- Release the memory allocated for the Secondary Stack. That is to say,
-- all the allocated chuncks.
function SS_Mark return Mark_Id;
-- Return the Mark corresponding to the current state of the stack
procedure SS_Release (M : Mark_Id);
-- Restore the state of the stack corresponding to the mark M. If an
-- additional chunk have been allocated, it will never be freed during a
generic
with procedure Put_Line (S : String);
procedure SS_Info;
-- Debugging procedure used to print out secondary Stack allocation
-- information. This procedure is generic in order to avoid a direct
-- dependance on a particular IO package.
SS_Pool : Secondary_Stack_Pool;
-- the pool for the secondary stack
private
type Mark_Id is new Integer;
end System.Secondary_Stack;