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