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+--  GHDL Run Time (GRT) -  Well known RTI types.
+--  Copyright (C) 2002 - 2014 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.
+--
+--  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.
+with Grt.Rtis; use Grt.Rtis;
+
+--  This package allow access to RTIs of some types.
+--  This is used to recognize some VHDL logic types.
+--  This is also used by grt.signals to set types of some implicit signals
+--   (such as 'stable or 'transation).
+
+package Grt.Rtis_Types is
+   --  RTIs for some logic types.
+   Std_Standard_Bit_RTI_Ptr : Ghdl_Rti_Access;
+
+   Std_Standard_Boolean_RTI_Ptr : Ghdl_Rti_Access;
+
+   --  std_ulogic.
+   --  A VHDL may not contain ieee.std_logic_1164 package.  So, this RTI
+   --  must be dynamicaly searched.
+   Ieee_Std_Logic_1164_Std_Ulogic_RTI_Ptr : Ghdl_Rti_Access := null;
+
+   --  Search RTI for types.
+   --  If a type is not found, its RTI is set to null.
+   --  If this procedure has already been called, then this is a noop.
+   procedure Search_Types_RTI;
+private
+   --  These are set either by grt.rtis_binding or by ghdlrun.
+   --  This is not very clean...
+   pragma Import (C, Std_Standard_Bit_RTI_Ptr,
+                  "std__standard__bit__RTI_ptr");
+
+   pragma Import (C, Std_Standard_Boolean_RTI_Ptr,
+                  "std__standard__boolean__RTI_ptr");
+end Grt.Rtis_Types;