| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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 -- |
| -- -- |
| -- Copyright (C) 1992-2003 Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 2, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- As a special exception, if other files instantiate generics from this -- |
| -- unit, or you link this unit with other files to produce an executable, -- |
| -- this unit does not by itself cause the resulting executable to be -- |
| -- covered by the GNU General Public License. This exception does not -- |
| -- however invalidate any other reasons why the executable file might be -- |
| -- covered by the GNU Public License. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Version for use in HI-E mode |
| |
| with System.Storage_Elements; |
| |
| package System.Secondary_Stack is |
| |
| package SSE renames System.Storage_Elements; |
| |
| Default_Secondary_Stack_Size : Natural := 10 * 1024; |
| -- Default size of a secondary stack. May be modified by binder -D switch |
| |
| procedure SS_Init |
| (Stk : System.Address; |
| Size : Natural := Default_Secondary_Stack_Size); |
| -- Initialize the secondary stack with a main stack of the given Size. |
| -- |
| -- Stk is an "in" parameter that is already pointing to a memory area of |
| -- size Size. |
| -- |
| -- The secondary stack is fixed, and any attempt to allocate more than the |
| -- initial size will result in a Storage_Error being raised. |
| |
| procedure SS_Allocate |
| (Address : out System.Address; |
| Storage_Size : SSE.Storage_Count); |
| -- Allocate enough space for a 'Storage_Size' bytes object with Maximum |
| -- alignment. The address of the allocated space is returned in 'Address' |
| |
| procedure SS_Free (Stk : in out System.Address); |
| -- Release the memory allocated for the Secondary Stack. That is to say, |
| -- all the allocated chuncks. |
| -- Upon return, Stk will be set to System.Null_Address |
| |
| type Mark_Id is private; |
| -- Type used to mark the stack. |
| |
| 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 |
| |
| private |
| |
| SS_Pool : Integer; |
| -- Unused entity that is just present to ease the sharing of the pool |
| -- mechanism for specific allocation/deallocation in the compiler |
| |
| type Mark_Id is new SSE.Integer_Address; |
| |
| end System.Secondary_Stack; |
