+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- 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: 1.2.10.1 $
--- --
--- Copyright (C) 1992-1999 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 : in out System.Address;
- Size : Natural := Default_Secondary_Stack_Size);
- -- Initialize the secondary stack with a main stack of the given Size.
- --
- -- If System.Parameters.Sec_Stack_Ratio equals Dynamic, Stk is really an
- -- "out" parameter that will be allocated on the heap. Then 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.
- --
- -- Otherwise (Sec_Stack_Ratio between 0 and 100), Stk is an "in" parameter
- -- that is already pointing to a Stack_Id. The secondary stack in this case
- -- is fixed, and any attempt to allocated more than the initial size will
- -- result in a Storage_Error being raised.
- --
- -- 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.Soft_Links.Get_Sec_Stack_Addr.
-
- 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
-
- 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
- -- dependence on a particular IO package.
-
-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;
projects / msp430-gcc.git / blobdiff