------------------------------------------------------------------------------ -- -- -- 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) 1992-2001 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. -- -- -- ------------------------------------------------------------------------------ with System.Storage_Elements; package System.Secondary_Stack is package SSE renames System.Storage_Elements; Default_Secondary_Stack_Size : constant := 10 * 1024; -- Default size of a secondary stack 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;