--  Memory segments.
--  Copyright (C) 2006 Tristan Gingold
--
--  GHDL is free software; you can redistribute it and/or modify it under
--  the terms of the GNU General Public License as published by the Free
--  Software Foundation; either version 2, or (at your option) any later
--  version.
--
--  GHDL 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 General Public License
--  for more details.
--
--  You should have received a copy of the GNU General Public License
--  along with GCC; see the file COPYING.  If not, write to the Free
--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
--  02111-1307, USA.
with System; use System;

package Memsegs_Mmap is
   --  A memseg is a growable memory space.  It can be resized with Resize.
   --  After each operation the base address can change and must be get
   --  with Get_Address.
   type Memseg_Type is private;

   --  Create a new memseg.
   function Create return Memseg_Type;

   --  Resize the memseg.
   procedure Resize (Seg : in out Memseg_Type; Size : Natural);

   --  Get the base address.
   function Get_Address (Seg : Memseg_Type) return Address;

   --  Free all the memory and initialize the memseg.
   procedure Delete (Seg : in out Memseg_Type);

   --  Set the protection to read+execute.
   procedure Set_Rx (Seg : in out Memseg_Type);

   pragma Inline (Create);
   pragma Inline (Get_Address);
private
   type Memseg_Type is record
      Base : Address := Null_Address;
      Size : Natural := 0;
   end record;
end Memsegs_Mmap;