ocarina-backends-properties.adb 134 KB
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------------------------------------------------------------------------------
--                                                                          --
--                           OCARINA COMPONENTS                             --
--                                                                          --
--          O C A R I N A . B A C K E N D S . P R O P E R T I E S           --
--                                                                          --
--                                 B o d y                                  --
--                                                                          --
--               Copyright (C) 2008-2010, GET-Telecom Paris.                --
--                                                                          --
-- Ocarina  is free software;  you  can  redistribute  it and/or  modify    --
-- it under terms of the GNU General Public License as published by the     --
-- Free Software Foundation; either version 2, or (at your option) any      --
-- later version. Ocarina 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 distributed with Ocarina; see file COPYING.   --
-- If not, write to the Free Software Foundation, 51 Franklin Street, Fifth --
-- Floor, Boston, MA 02111-1301, 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.                                       --
--                                                                          --
--                 Ocarina is maintained by the Ocarina team                --
--                       (ocarina-users@listes.enst.fr)                     --
--                                                                          --
------------------------------------------------------------------------------

with Locations;
with Namet;

with Ocarina.ME_AADL.AADL_Tree.Nodes;
with Ocarina.ME_AADL.AADL_Tree.Nutils;
with Ocarina.ME_AADL.AADL_Instances.Nodes;
with Ocarina.ME_AADL.AADL_Instances.Entities;
with Ocarina.ME_AADL.AADL_Instances.Nutils;
with Ocarina.ME_AADL.AADL_Instances.Entities.Properties;
with Ocarina.ME_AADL.AADL_Tree.Entities.Properties;
with Ocarina.ME_AADL.AADL_Tree.Entities;
with Ocarina.AADL_Values;
with Ocarina.Instances.Queries;

with Ocarina.Backends.Utils;
with Ocarina.Backends.Messages;

package body Ocarina.Backends.Properties is

   use Locations;
   use Namet;
   use Ocarina.ME_AADL.AADL_Tree.Nodes;
   use Ocarina.ME_AADL.AADL_Instances.Nodes;
   use Ocarina.ME_AADL.AADL_Instances.Nutils;
   use Ocarina.ME_AADL.AADL_Instances.Entities;
   use Ocarina.ME_AADL.AADL_Instances.Entities.Properties;
   use Ocarina.Instances.Queries;
   use Ocarina.Backends.Utils;
   use Ocarina.Backends.Messages;

   package ATN renames Ocarina.ME_AADL.AADL_Tree.Nodes;
   package ATE renames Ocarina.ME_AADL.AADL_Tree.Entities;
   package ATNU renames Ocarina.ME_AADL.AADL_Tree.Nutils;
   package AIN renames Ocarina.ME_AADL.AADL_Instances.Nodes;
   package AINU renames Ocarina.ME_AADL.AADL_Instances.Nutils;
   package AIEP renames Ocarina.ME_AADL.AADL_Instances.Entities.Properties;
   package ATEP renames Ocarina.ME_AADL.AADL_Tree.Entities.Properties;

   ----------------------------------
   -- Several component properties --
   ----------------------------------

   AADL_Priority      : Name_Id;
   --  Thread and Data

   Compute_Entrypoint_Source_Text_Name : Name_Id;
   Compute_Entrypoint_Name             : Name_Id;
   Compute_Entrypoint_Call_Sequence    : Name_Id;
   --  Thread and IN [event] [data] ports

   Source_Language    : Name_Id;
   Source_Name        : Name_Id;
   T_Source_Name      : Name_Id;
   Type_Source_Name   : Name_Id;
   Source_Text        : Name_Id;
   Fusion_Occurred    : Name_Id;
   Priority_Shifter   : Name_Id;
   Scheduler_Name     : Name_Id;
   Original_Name      : Name_Id;
   --  Subprogram, thread, data, port...

   Implemented_As     : Name_Id;

   -------------------------------
   -- Data component properties --
   -------------------------------

   Base_Type                 : Name_Id;
   Code_Set                  : Name_Id;
   Data_Digits               : Name_Id;
   Data_Scale                : Name_Id;
   Data_Representation       : Name_Id;
   Dimension                 : Name_Id;
   Element_Names             : Name_Id;
   Enumerators               : Name_Id;
   IEEE754_Precision         : Name_Id;
   Initial_Value             : Name_Id;
   Integer_Range             : Name_Id;
   Measurement_Unit          : Name_Id;
   Number_Representation     : Name_Id;
   Real_Range                : Name_Id;
   Data_Required_Access      : Name_Id;
   Data_Provided_Access      : Name_Id;
   Data_Size                 : Name_Id;
   Code_Size                 : Name_Id;
   Data_Concurrency_Protocol : Name_Id;

   ---------------------------------
   -- Thread component properties --
   ---------------------------------

   Dispatch_Offset          : Name_Id;
   Thread_Period            : Name_Id;
   Thread_Deadline          : Name_Id;
   Thread_Dispatch_Protocol : Name_Id;
   Thread_Cheddar_Priority  : Name_Id;
   Thread_Stack_Size        : Name_Id;
   Initialize_Entrypoint    : Name_Id;
   Initialize_Entrypoint_Source_Text : Name_Id;
   Recover_Entrypoint    : Name_Id;
   Recover_Entrypoint_Source_Text : Name_Id;

   ----------------------------------
   -- Process component properties --
   ----------------------------------

   Port_Number             : Name_Id;
   Process_Id              : Name_Id;
   Processor_Binding       : Name_Id;
   Memory_Binding          : Name_Id;
   Process_Channel_Address : Name_Id;

   Scheduling_Protocol                                   : Name_Id;
   PARAMETRIC_PROTOCOL_Name                              : Name_Id;
   EARLIEST_DEADLINE_FIRST_PROTOCOL_Name                 : Name_Id;
   LEAST_LAXITY_FIRST_PROTOCOL_Name                      : Name_Id;
   RATE_MONOTONIC_PROTOCOL_Name                          : Name_Id;
   DEADLINE_MONOTONIC_PROTOCOL_Name                      : Name_Id;
   ROUND_ROBIN_PROTOCOL_Name                             : Name_Id;
   TIME_SHARING_BASED_ON_WAIT_TIME_PROTOCOL_Name         : Name_Id;
   POSIX_1003_HIGHEST_PRIORITY_FIRST_PROTOCOL_Name       : Name_Id;
   D_OVER_PROTOCOL_Name                                  : Name_Id;
   MAXIMUM_URGENCY_FIRST_BASED_ON_LAXITY_PROTOCOL_Name   : Name_Id;
   MAXIMUM_URGENCY_FIRST_BASED_ON_DEADLINE_PROTOCOL_Name : Name_Id;
   TIME_SHARING_BASED_ON_CPU_USAGE_PROTOCOL_Name         : Name_Id;
   NO_SCHEDULING_PROTOCOL_Name                           : Name_Id;
   HIERARCHICAL_CYCLIC_PROTOCOL_Name                     : Name_Id;
   HIERARCHICAL_ROUND_ROBIN_PROTOCOL_Name                : Name_Id;
   HIERARCHICAL_FIXED_PRIORITY_PROTOCOL_Name             : Name_Id;
   HIERARCHICAL_PARAMETRIC_PROTOCOL_Name                 : Name_Id;

   ---------------------------------
   -- Memory component properties --
   ---------------------------------

   Word_Count              : Name_Id;
   Word_Size               : Name_Id;

   ------------------------------------
   -- Processor component properties --
   ------------------------------------

   Location           : Name_Id;
   Execution_Platform : Name_Id;

   ---------------------------------
   -- AADL Connections properties --
   ---------------------------------

   Connection_Binding : Name_Id;

   -------------------------------
   -- Bus components properties --
   -------------------------------

   Transport_API : Name_Id;

   ---------------------
   -- Port properties --
   ---------------------

   Queue_Size                 : Name_Id;
   Overflow_Handling_Protocol : Name_Id;
   Overflow_Handling_Protocol_DropOldest_Name : Name_Id;
   Overflow_Handling_Protocol_DropNewest_Name : Name_Id;
   Overflow_Handling_Protocol_Error_Name : Name_Id;
   Port_Urgency               : Name_Id;
   Port_Timing                : Name_Id;
   Port_Timing_Sampled_Name   : Name_Id;
   Port_Timing_Immediate_Name : Name_Id;
   Port_Timing_Delayed_Name   : Name_Id;

   ---------------------------------
   -- System component properties --
   ---------------------------------

   Protocol : Name_Id;

   --  All the Name_Id's below MUST be initialized in the Init
   --  procedure.

   Data_Array_Name     : Name_Id;
   Data_Boolean_Name   : Name_Id;
   Data_Character_Name : Name_Id;
   Data_Enum_Name      : Name_Id;
   Data_Float_Name     : Name_Id;
   Data_Fixed_Name     : Name_Id;
   Data_Integer_Name   : Name_Id;
   Data_String_Name    : Name_Id;
   Data_Struct_Name    : Name_Id;
   Data_Union_Name     : Name_Id;

   Access_Read_Only_Name  : Name_Id;
   Access_Write_Only_Name : Name_Id;
   Access_Read_Write_Name : Name_Id;
   Access_By_Method_Name  : Name_Id;

   Precision_Simple_Name : Name_Id;
   Precision_Double_Name : Name_Id;

   Representation_Signed_Name   : Name_Id;
   Representation_Unsigned_Name : Name_Id;

   Concurrency_NoneSpecified_Name               : Name_Id;
   Concurrency_Read_Only_Name                   : Name_Id;
   Concurrency_Protected_Access_Name            : Name_Id;
   Concurrency_Priority_Ceiling_Name            : Name_Id;
   Concurrency_Priority_Ceiling_Protocol_Name   : Name_Id;

   Language_Ada_95_Name   : Name_Id;
   Language_Ada_Name      : Name_Id;
   Language_Ada_05_Name   : Name_Id;
   Language_C_Name        : Name_Id;
   Language_RTSJ_Name     : Name_Id;
   Language_Simulink_Name : Name_Id;
   Language_Scade_Name    : Name_Id;
   Language_ASN1_Name     : Name_Id;
   Language_Lustre_Name   : Name_Id;
   Language_Esterel_Name  : Name_Id;
   Language_Lustre5_Name  : Name_Id;
   Language_Lustre6_Name  : Name_Id;
   Language_GUI_Name      : Name_Id;
   Language_Rhapsody_Name : Name_Id;
   Language_SCADE6_Name   : Name_Id;
   Language_SDL_Name      : Name_Id;

   Thread_Periodic_Name   : Name_Id;
   Thread_Aperiodic_Name  : Name_Id;
   Thread_Sporadic_Name   : Name_Id;
   Thread_Hybrid_Name     : Name_Id;
   Thread_Background_Name : Name_Id;

   Time_Ps_Name  : Name_Id;
   Time_Ns_Name  : Name_Id;
   Time_Us_Name  : Name_Id;
   Time_Ms_Name  : Name_Id;
   Time_Sec_Name : Name_Id;
   Time_Min_Name : Name_Id;
   Time_Hr_Name  : Name_Id;

   Size_Bit_Name       : Name_Id;
   Size_Byte_Name      : Name_Id;
   Size_Kilo_Byte_Name : Name_Id;
   Size_Mega_Byte_Name : Name_Id;
   Size_Giga_Byte_Name : Name_Id;
   Size_Tera_Byte_Name : Name_Id;

   Platform_Native_Name      : Name_Id;
   Platform_LEON_RTEMS_Name  : Name_Id;
   Platform_LEON_GNAT_Name   : Name_Id;
   Platform_LEON_ORK_Name    : Name_Id;
   Platform_ERC32_ORK_Name   : Name_Id;
   Platform_ARM_DSLINUX_Name : Name_Id;
   Platform_ARM_N770_Name    : Name_Id;
   Platform_MARTE_OS_Name    : Name_Id;

   Transport_BSD_Sockets_Name  : Name_Id;
   Transport_SpaceWire_Name    : Name_Id;

   Protocol_IIOP_Name : Name_Id;
   Protocol_DIOP_Name : Name_Id;

   Provided_Virtual_Bus_Class       : Name_Id;
   Allowed_Connection_Binding_Class : Name_Id;
   Compute_Execution_Time           : Name_Id;
   Compute_Deadline                 : Name_Id;

   --------------------
   -- SEI properties --
   --------------------

   SEI_Wait_For_All_Events          : Name_Id;
   SEI_Stream_Miss_Rate             : Name_Id;

   ----------------------
   -- Scade properties --
   ----------------------

   Scade_Signal_Name                : Name_Id;

   --------------------
   -- POK properties --
   --------------------

   POK_Arch_x86_Name                : Name_Id;
   POK_BSP_x86_qemu_Name            : Name_Id;
   POK_Arch_Sparc_Name              : Name_Id;
   POK_BSP_Leon_Name                : Name_Id;
   POK_Arch_ppc_Name                : Name_Id;
   POK_BSP_prep_Name                : Name_Id;
   POK_Needed_Memory_Size           : Name_Id;
   POK_BSP                          : Name_Id;
   POK_Arch                         : Name_Id;
   POK_Source_Location              : Name_Id;
   POK_Timeslice                    : Name_Id;
   POK_Security_Level               : Name_Id;
   POK_Mils_Verified                : Name_Id;
   POK_Refresh_Time                 : Name_Id;
   POK_Scheduler                    : Name_Id;
   POK_Scheduler_RMS_Name           : Name_Id;
   POK_Scheduler_EDF_Name           : Name_Id;
   POK_Scheduler_RR_Name            : Name_Id;
   POK_Scheduler_LLF_Name           : Name_Id;
   POK_Scheduler_Static_Name        : Name_Id;
   POK_Slots                        : Name_Id;
   POK_Slots_Allocation             : Name_Id;
   POK_Major_Frame                  : Name_Id;

   POK_Recovery_Errors                 : Name_Id;
   POK_Recovery_Error_Deadline         : Name_Id;
   POK_Recovery_Error_Application      : Name_Id;
   POK_Recovery_Error_Numeric          : Name_Id;
   POK_Recovery_Error_Request          : Name_Id;
   POK_Recovery_Error_Stack            : Name_Id;
   POK_Recovery_Error_Memory           : Name_Id;
   POK_Recovery_Error_Hardware         : Name_Id;
   POK_Recovery_Error_Power            : Name_Id;
   POK_Recovery_Error_Partition_Conf   : Name_Id;
   POK_Recovery_Error_Partition_Init   : Name_Id;
   POK_Recovery_Error_Partition_Sched  : Name_Id;
   POK_Recovery_Error_Partition_Proc   : Name_Id;
   POK_Recovery_Error_Kernel_Init      : Name_Id;
   POK_Recovery_Error_Kernel_Sched     : Name_Id;
   POK_Recovery_Actions                            : Name_Id;
   POK_Recovery_Action_Ignore                      : Name_Id;
   POK_Recovery_Action_Confirm                     : Name_Id;
   POK_Recovery_Action_Thread_Restart              : Name_Id;
   POK_Recovery_Action_Thread_Stop_And_Start_Other : Name_Id;
   POK_Recovery_Action_Thread_Stop                 : Name_Id;
   POK_Recovery_Action_Partition_Restart           : Name_Id;
   POK_Recovery_Action_Partition_Stop              : Name_Id;
   POK_Recovery_Action_Kernel_Stop                 : Name_Id;
   POK_Recovery_Action_Kernel_Restart              : Name_Id;
   POK_Recovery_Action_Nothing                     : Name_Id;

   -------------------------
   -- ARINC653 properties --
   -------------------------

   ARINC653_Module_Major_Frame               : Name_Id;
   ARINC653_Partition_Slots                  : Name_Id;
   ARINC653_Slots_Allocation                 : Name_Id;
   ARINC653_Sampling_Refresh_Period          : Name_Id;
   ARINC653_Timeout                          : Name_Id;
   ARINC653_Queuing_Discipline_Name          : Name_Id;
   ARINC653_Queuing_Discipline_Fifo_Name     : Name_Id;
   ARINC653_Queuing_Discipline_Priority_Name : Name_Id;
   ARINC653_Access_Type_Name                 : Name_Id;
   ARINC653_Access_Type_Read_Name            : Name_Id;
   ARINC653_Access_Type_Write_Name           : Name_Id;
   ARINC653_Access_Type_Read_Write_Name      : Name_Id;
   ARINC653_Memory_Kind_Name                 : Name_Id;
   ARINC653_Memory_Kind_Code_Name            : Name_Id;
   ARINC653_Memory_Kind_Data_Name            : Name_Id;

   ARINC653_Actions_Name                              : Name_Id;
   ARINC653_Action_Ignore_Name                        : Name_Id;
   ARINC653_Action_Confirm_Name                       : Name_Id;
   ARINC653_Action_Partition_Stop_Name                : Name_Id;
   ARINC653_Action_Module_Stop_Name                   : Name_Id;
   ARINC653_Action_Process_Stop_Name                  : Name_Id;
   ARINC653_Action_Process_Stop_And_Start_Other_Name  : Name_Id;
   ARINC653_Action_Process_Restart_Name               : Name_Id;
   ARINC653_Action_Partition_Restart_Name             : Name_Id;
   ARINC653_Action_Module_Restart_Name                : Name_Id;
   ARINC653_Action_Nothing_Name                       : Name_Id;

   ARINC653_Errors_Name                      : Name_Id;
   ARINC653_Error_Module_Init_Name           : Name_Id;
   ARINC653_Error_Module_Config_Name         : Name_Id;
   ARINC653_Error_Module_Scheduling_Name     : Name_Id;
   ARINC653_Error_Partition_Config_Name      : Name_Id;
   ARINC653_Error_Partition_Init_Name        : Name_Id;
   ARINC653_Error_Partition_Scheduling_Name  : Name_Id;
   ARINC653_Error_Partition_Handler_Name     : Name_Id;
   ARINC653_Error_Deadline_Miss_Name         : Name_Id;
   ARINC653_Error_Application_Name           : Name_Id;
   ARINC653_Error_Numeric_Name               : Name_Id;
   ARINC653_Error_Invalid_Request_Name       : Name_Id;
   ARINC653_Error_Stack_Overflow_Name        : Name_Id;
   ARINC653_Error_Memory_Violation_Name      : Name_Id;
   ARINC653_Error_Hardware_Fault_Name        : Name_Id;
   ARINC653_Error_Power_Fail_Name            : Name_Id;

   function Get_Size_Property_Value
     (C             : Node_Id;
      Property_Name : Name_Id)
     return Size_Type;
   --  Code factorization between thread and data interrogators

   function Convert_Value_To_Time_Type (V : Node_Id) return Time_Type;

   function Get_Compute_Entrypoint
     (E       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Name_Id;
   function Get_Compute_Entrypoint
     (E       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Node_Id;
   --  Code factorization between thread and port interrogators
   --  Note that in case of call sequence reference,
   --  it will return the call sequence's single (by construction)
   --  subprogram call

   function Is_Defined_Entrypoint_Property
     (E       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Boolean;

   function Get_Time_Property_Value
     (E             : Node_Id;
      Property_Name : Name_Id)
     return Time_Type;
   --  Return the value of the property "Property_Name" whose AADL
   --  type is Time.

   function Get_Priority (E : Node_Id) return Unsigned_Long_Long;
   --  Code factorization between thread and data components

   -----------------------------
   -- Get_Size_Property_Value --
   -----------------------------

   function Get_Size_Property_Value
     (C             : Node_Id;
      Property_Name : Name_Id)
     return Size_Type
   is
      V      : Node_Id;
      U      : Node_Id;
      Result : Size_Type;
      N      : Name_Id;
   begin
      if Is_Defined_Integer_Property (C, Property_Name) then
         V := Get_Value_Of_Property_Association (C, Property_Name);

         if Present (V)
           and then Present (Unit_Identifier (V))
         then
            U := Unit_Identifier (V);

            --  Get the size

            Result.S := Get_Integer_Property (C, Property_Name);

            --  Convert the value to its unit

            N := ATN.Name (U);

            if N = Size_Bit_Name then
               Result.U := Bit;
            elsif N = Size_Byte_Name then
               Result.U := Byte;
            elsif N = Size_Kilo_Byte_Name then
               Result.U := Kilo_Byte;
            elsif N = Size_Mega_Byte_Name then
               Result.U := Mega_Byte;
            elsif N = Size_Giga_Byte_Name then
               Result.U := Giga_Byte;
            elsif N = Size_Tera_Byte_Name then
               Result.U := Tera_Byte;
            else
               Display_Located_Error
                 (AIN.Loc (U),
                  "Wrong unit",
                  Fatal => True);
               return ((0, Bit));
            end if;

            return Result;
         else
            Display_Located_Error
              (AIN.Loc (U),
               "A size without unit",
               Fatal => True);
            return ((0, Bit));
         end if;
      else
         return ((0, Bit));
      end if;
   end Get_Size_Property_Value;

   ----------------------------
   -- Get_Compute_Entrypoint --
   ----------------------------

   function Get_Compute_Entrypoint
     (E       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Name_Id
   is
   begin
      if Is_Defined_String_Property
        (E, Compute_Entrypoint_Source_Text_Name, In_Mode) then
         return Get_String_Property
           (E, Compute_Entrypoint_Source_Text_Name, In_Mode);
      end if;

      return No_Name;
   end Get_Compute_Entrypoint;

   ----------------------------
   -- Get_Compute_Entrypoint --
   ----------------------------

   function Get_Compute_Entrypoint
     (E       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Node_Id
   is
   begin
      if Kind (E) = K_Port_Spec_Instance and then not AIN.Is_In (E) then
         Display_Located_Error
           (AIN.Loc (E),
            "Compute entrypoint cannot be specified for OUT-only ports",
            Fatal => True);
      end if;

      if Is_Defined_String_Property
        (E, Compute_Entrypoint_Source_Text_Name, In_Mode) then
         return Get_Property_Association
           (E, Compute_Entrypoint_Source_Text_Name, In_Mode);
      elsif Is_Defined_Reference_Property
        (E, Compute_Entrypoint_Call_Sequence, In_Mode) then
         return Get_Property_Association
           (E, Compute_Entrypoint_Call_Sequence, In_Mode);
      elsif Is_Defined_Property
         (E, Compute_Entrypoint_Name, In_Mode) then
         return Get_Classifier_Property
            (E, Compute_Entrypoint_Name, In_Mode);
      else
         return No_Node;
      end if;

   end Get_Compute_Entrypoint;

   ------------------------------------
   -- Is_Defined_Entrypoint_Property --
   ------------------------------------

   function Is_Defined_Entrypoint_Property
     (E       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Boolean
   is
   begin
      if Is_Defined_String_Property
        (E, Compute_Entrypoint_Source_Text_Name, In_Mode) then
         return True;

      elsif Is_Defined_Reference_Property
        (E, Compute_Entrypoint_Call_Sequence, In_Mode) then
         return True;

      else
         return False;
      end if;
   end Is_Defined_Entrypoint_Property;

   -------------------
   -- Get_Base_Type --
   -------------------

   function Get_Base_Type (D : Node_Id) return List_Id is
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_List_Property (D, Base_Type) then
         return Get_List_Property (D, Base_Type);
      else
         return No_List;
      end if;
   end Get_Base_Type;

   ------------------
   -- Get_Code_Set --
   ------------------

   function Get_Code_Set (D : Node_Id) return Unsigned_Long_Long is
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_Integer_Property (D, Code_Set) then
         return Get_Integer_Property (D, Code_Set);
      else
         return 0;
      end if;
   end Get_Code_Set;

   ---------------------
   -- Get_Data_Digits --
   ---------------------

   function Get_Data_Digits (D : Node_Id) return Unsigned_Long_Long is
   begin
      pragma Assert (Get_Data_Representation (D) = Data_Fixed);

      if Is_Defined_Integer_Property (D, Data_Digits) then
         return Get_Integer_Property (D, Data_Digits);
      else
         return 0;
      end if;
   end Get_Data_Digits;

   --------------------
   -- Get_Data_Scale --
   --------------------

   function Get_Data_Scale (D : Node_Id) return Unsigned_Long_Long is
   begin
      pragma Assert (Get_Data_Representation (D) = Data_Fixed);

      if Is_Defined_Integer_Property (D, Data_Scale) then
         return Get_Integer_Property (D, Data_Scale);
      else
         return 0;
      end if;
   end Get_Data_Scale;

   -----------------------------
   -- Get_Data_Representation --
   -----------------------------

   function Get_Data_Representation
     (D : Node_Id) return Supported_Data_Representation
   is
      F      : Node_Id;
      T_Name : Name_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_Enumeration_Property (D, Data_Representation) then
         T_Name := Get_Enumeration_Property (D, Data_Representation);

         --  Although Name_Id is a scalar type, we cannot use a switch
         --  case since the <..>_Name global variables are not (and
         --  cannot be) static.

         if T_Name = Data_Array_Name then
            if not Is_Defined_List_Property (D, Dimension) then
               Display_Located_Error
                 (ATN.Loc (D),
                  "Array types must have one or more dimensions",
                  Fatal => True);
            end if;

            if ATNU.Length (Get_Base_Type (D)) /= 1 then
               Display_Located_Error
                 (ATN.Loc (D),
                  "Array types must have an element type",
                  Fatal => True);
            end if;

            return Data_Array;

         elsif T_Name = Data_Boolean_Name then
            return Data_Boolean;

         elsif T_Name = Data_Character_Name then
            if Get_Code_Set (D) = 16#0# or else Get_Code_Set (D) = 16#1# then
               --  PCS: Portable Character Set
               return Data_Character;
            else
               return Data_Wide_Character;
            end if;

         elsif T_Name = Data_Enum_Name then
            if Get_Enumerators (D)'Length = 0 then
               Display_Located_Error
                 (ATN.Loc (D),
                  "Enumeration type must be assigned an enumerator list",
                  Fatal => True);
            end if;

            return Data_Enum;

         elsif T_Name = Data_Float_Name then
            return Data_Float;

         elsif T_Name = Data_Fixed_Name then
            return Data_Fixed;

         elsif T_Name = Data_Integer_Name then
            return Data_Integer;

         elsif T_Name = Data_String_Name then
            if not Is_Defined_List_Property (D, Dimension) then
               Display_Located_Error
                 (ATN.Loc (D),
                  "String types must have a maximum length",
                  Fatal => True);
            end if;

            if Get_Code_Set (D) = 16#0# or else Get_Code_Set (D) = 16#1# then
               --  PCS: Portable Character Set
               return Data_String;
            else
               return Data_Wide_String;
            end if;

         elsif T_Name = Data_Struct_Name then
            declare
               Fields : constant Name_Array := Get_Element_Names (D);
               Types  : constant List_Id    := Get_Base_Type (D);
            begin
               --  Some trivial case elimination and coherency checking

               if Fields'Length /= ATNU.Length (Types) then
                  Display_Located_Error
                    (AIN.Loc (D),
                     "The number of elements and their corresponding"
                     & " types ar fifferent in this data structure",
                     Fatal => True);
               elsif Fields'Length = 0
                 and then Is_Empty (AIN.Subcomponents (D))
               then
                  Display_Located_Error
                    (AIN.Loc (D),
                     "Data structures must be defined using the"
                     & " subcomponents or the Base_Type/Element_Names"
                     & " properties.",
                     Fatal => True);
               end if;

               if Is_Empty (AIN.Features (D)) then
                  return Data_Struct;
               else
                  --  Check whether it is a protected type

                  F := AIN.First_Node (AIN.Features (D));

                  while Present (F) loop
                     if Kind (F) /= K_Subprogram_Spec_Instance
                       and then Kind (F) /= K_Subcomponent_Access_Instance
                     then
                        Display_Located_Error
                          (AIN.Loc (F),
                           "Unsupported feature kind for data type",
                           Fatal => True);
                     end if;

                     F := AIN.Next_Node (F);
                  end loop;

                  return Data_With_Accessors;
               end if;
            end;

         elsif T_Name = Data_Union_Name then
            return Data_Union;
         else
            Display_Located_Error
              (AIN.Loc (D),
               "Unknown data type",
               Fatal => True);
            return Data_None;
         end if;
      else
         return Data_None;
      end if;
   end Get_Data_Representation;

   -------------------
   -- Get_Dimension --
   -------------------

   function Get_Dimension (D : Node_Id) return ULL_Array is
      D_List : List_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_List_Property (D, Dimension) then
         D_List := Get_List_Property (D, Dimension);

         declare
            use Ocarina.AADL_Values;

            L   : constant Nat := Nat (ATNU.Length (D_List));
            Res : ULL_Array (1 .. L);
            N   : Node_Id;
         begin
            N := ATN.First_Node (D_List);

            for J in Res'Range loop
               Res (J) := Value (Value (Number_Value (N))).IVal;
               N := ATN.Next_Node (N);
            end loop;

            return Res;
         end;
      else
         return Empty_ULL_Array;
      end if;
   end Get_Dimension;

   -----------------------
   -- Get_Element_Names --
   -----------------------

   function Get_Element_Names (D : Node_Id) return Name_Array is
      N_List : List_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_List_Property (D, Element_Names) then
         N_List := Get_List_Property (D, Element_Names);

         declare
            use Ocarina.AADL_Values;

            L   : constant Nat := Nat (ATNU.Length (N_List));
            Res : Name_Array (1 .. L);
            N   : Node_Id;
         begin
            N := ATN.First_Node (N_List);

            for J in Res'Range loop
               Res (J) := Value (Value (N)).SVal;
               N := ATN.Next_Node (N);
            end loop;

            return Res;
         end;
      else
         return Empty_Name_Array;
      end if;
   end Get_Element_Names;

   ---------------------
   -- Get_Enumerators --
   ---------------------

   function Get_Enumerators (D : Node_Id) return Name_Array is
      E_List : List_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_List_Property (D, Enumerators) then
         E_List := Get_List_Property (D, Enumerators);

         declare
            use Ocarina.AADL_Values;

            L   : constant Nat := Nat (ATNU.Length (E_List));
            Res : Name_Array (1 .. L);
            N   : Node_Id;
         begin
            N := ATN.First_Node (E_List);

            for J in Res'Range loop
               Res (J) := Value (Value (N)).SVal;
               N := ATN.Next_Node (N);
            end loop;

            return Res;
         end;
      else
         return Empty_Name_Array;
      end if;
   end Get_Enumerators;

   ---------------------------
   -- Get_IEEE754_Precision --
   ---------------------------

   function Get_IEEE754_Precision
     (D : Node_Id)
     return Supported_IEEE754_Precision
   is
      P_Name : Name_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_Enumeration_Property (D, IEEE754_Precision) then
         P_Name := Get_Enumeration_Property (D, IEEE754_Precision);

         if P_Name = Precision_Simple_Name then
            return Precision_Simple;
         elsif P_Name = Precision_Double_Name then
            return Precision_Double;
         else
            Display_Located_Error
              (AIN.Loc (D),
               "Unknown floating point precision",
               Fatal => True);
            return Precision_None;
         end if;
      else
         return Precision_None;
      end if;
   end Get_IEEE754_Precision;

   -----------------------
   -- Get_Initial_Value --
   -----------------------

   function Get_Initial_Value (D : Node_Id) return Name_Array is
      I_List : List_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_List_Property (D, Initial_Value) then
         I_List := Get_List_Property (D, Initial_Value);

         declare
            use Ocarina.AADL_Values;

            L   : constant Nat := Nat (Length (I_List));
            Res : Name_Array (1 .. L);
            N   : Node_Id;
         begin
            N := AIN.First_Node (I_List);

            for J in Res'Range loop
               Res (J) := Value (Value (N)).SVal;
               N := AIN.Next_Node (N);
            end loop;

            return Res;
         end;
      else
         return Empty_Name_Array;
      end if;
   end Get_Initial_Value;

   -----------------------
   -- Get_Integer_Range --
   -----------------------

   function Get_Integer_Range (D : Node_Id) return LL_Array is
      R_List  : List_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_List_Property (D, Integer_Range) then
         R_List := Get_List_Property (D, Integer_Range);

         declare
            use Ocarina.AADL_Values;

            L   : constant Nat := Nat (Length (R_List));
            Res : LL_Array (1 .. L);
            N   : Node_Id;
         begin
            N := AIN.First_Node (R_List);

            for J in Res'Range loop
               if Value (Value (N)).ISign then
                  Res (J) := -Long_Long (Value (Value (N)).IVal);
               else
                  Res (J) := Long_Long (Value (Value (N)).IVal);
               end if;

               N := AIN.Next_Node (N);
            end loop;

            return Res;
         end;
      else
         return Empty_LL_Array;
      end if;
   end Get_Integer_Range;

   -------------------------
   -- Get_Mesurement_Unit --
   -------------------------

   function Get_Mesurement_Unit (D : Node_Id) return Name_Id is
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_String_Property (D, Measurement_Unit) then
         return Get_String_Property (D, Measurement_Unit);
      else
         return No_Name;
      end if;
   end Get_Mesurement_Unit;

   -------------------------------
   -- Get_Number_Representation --
   -------------------------------

   function Get_Number_Representation
     (D : Node_Id) return Supported_Number_Representation
   is
      R_Name : Name_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_Enumeration_Property (D, Number_Representation) then
         R_Name := Get_Enumeration_Property (D, Number_Representation);

         if R_Name = Representation_Signed_Name then
            return Representation_Signed;
         elsif R_Name = Representation_Unsigned_Name then
            return Representation_Unsigned;
         else
            Display_Located_Error
              (AIN.Loc (D),
               "Unknown floating point representation",
               Fatal => True);
            return Representation_None;
         end if;
      else
         return Representation_None;
      end if;

   end Get_Number_Representation;

   --------------------
   -- Get_Real_Range --
   --------------------

   function Get_Real_Range (D : Node_Id) return LD_Array is
      R_List : List_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_List_Property (D, Real_Range) then
         R_List := Get_List_Property (D, Real_Range);

         declare
            use Ocarina.AADL_Values;

            L   : constant Nat := Nat (Length (R_List));
            Res : LD_Array (1 .. L);
            N   : Node_Id;
         begin
            N := AIN.First_Node (R_List);

            for J in Res'Range loop
               if Value (Value (N)).RSign then
                  Res (J) := -Long_Double (Value (Value (N)).RVal);
               else
                  Res (J) := Long_Double (Value (Value (N)).RVal);
               end if;

               N := AIN.Next_Node (N);
            end loop;

            return Res;
         end;
      else
         return Empty_LD_Array;
      end if;
   end Get_Real_Range;

   -------------------
   -- Get_Data_Size --
   -------------------

   function Get_Data_Size (D : Node_Id) return Size_Type is
   begin
      pragma Assert (AINU.Is_Data (D) or else AINU.Is_Process (D));

      return (Get_Size_Property_Value (D, Data_Size));
   end Get_Data_Size;

   -------------------
   -- Get_Code_Size --
   -------------------

   function Get_Code_Size (E : Node_Id) return Size_Type is
   begin
      return (Get_Size_Property_Value (E, Code_Size));
   end Get_Code_Size;

   ------------------------------------
   -- Get_Overflow_Handling_Protocol --
   ------------------------------------

   function Get_Overflow_Handling_Protocol
     (P : Node_Id) return Supported_Overflow_Handling_Protocol
   is
      OHP_Name : Name_Id;
   begin
      if Is_Defined_Enumeration_Property (P, Overflow_Handling_Protocol) then
         OHP_Name := Get_Enumeration_Property (P, Overflow_Handling_Protocol);

         if OHP_Name = Overflow_Handling_Protocol_DropOldest_Name then
            return Overflow_Handling_Protocol_DropOldest;
         elsif OHP_Name = Overflow_Handling_Protocol_DropNewest_Name then
            return Overflow_Handling_Protocol_DropNewest;
         elsif OHP_Name = Overflow_Handling_Protocol_Error_Name then
            return Overflow_Handling_Protocol_Error;
         else
            Display_Located_Error
              (AIN.Loc (P),
               "Unknown port overflow handling protocol name",
               Fatal => True);
            return Overflow_Handling_Protocol_DropOldest;
         end if;
      else
         return Overflow_Handling_Protocol_DropOldest;
      end if;
   end Get_Overflow_Handling_Protocol;

   ----------------------------------------
   -- Get_Priority_Celing_Of_Data_Access --
   ----------------------------------------

   function Get_Priority_Celing_Of_Data_Access
     (D : Node_Id)
     return Unsigned_Long_Long
   is
      Prio : Unsigned_Long_Long;
   begin
      pragma Assert (AINU.Is_Data (D));

      Prio := Get_Priority (D);

      if Prio /= 0 and then
        Get_Concurrency_Protocol (D) /= Concurrency_Priority_Ceiling
      then
         Display_Located_Error
           (AIN.Loc (D),
            "Inconsistent definition of data types: should define "
            & "Concurrency_Control_Protocol to "
            & "Concurrency_Priority_Ceiling",
            Fatal => True);
      end if;

      return Prio;
   end Get_Priority_Celing_Of_Data_Access;

   ------------------------------
   -- Get_Provided_Data_Access --
   ------------------------------

   function Get_Provided_Data_Access
     (D : Node_Id)
     return Supported_Data_Access
   is
      T_Name : Name_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_Enumeration_Property (D, Data_Provided_Access) then
         T_Name := Get_Enumeration_Property (D, Data_Provided_Access);

         if T_Name = Access_Read_Only_Name then
            return Access_Read_Only;
         elsif T_Name = Access_Write_Only_Name then
            return Access_Write_Only;
         elsif T_Name = Access_Read_Write_Name then
            return Access_Read_Write;
         elsif T_Name = Access_By_Method_Name then
            return Access_By_Method;
         else
            Display_Located_Error
              (AIN.Loc (D),
               "Unknown access type",
               Fatal => True);
            return Access_None;
         end if;
      else
         return Access_None;
      end if;
   end Get_Provided_Data_Access;

   ------------------------------
   -- Get_Required_Data_Access --
   ------------------------------

   function Get_Required_Data_Access
     (D : Node_Id)
     return Supported_Data_Access
   is
      T_Name : Name_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_Enumeration_Property (D, Data_Required_Access) then
         T_Name := Get_Enumeration_Property (D, Data_Required_Access);

         if T_Name = Access_Read_Only_Name then
            return Access_Read_Only;
         elsif T_Name = Access_Write_Only_Name then
            return Access_Write_Only;
         elsif T_Name = Access_Read_Write_Name then
            return Access_Read_Write;
         elsif T_Name = Access_By_Method_Name then
            return Access_By_Method;
         else
            Display_Located_Error
              (AIN.Loc (D),
               "Unknown access type",
               Fatal => True);
            return Access_None;
         end if;
      else
         return Access_None;
      end if;
   end Get_Required_Data_Access;

   ------------------------------
   -- Get_Concurrency_Protocol --
   ------------------------------

   function Get_Concurrency_Protocol
     (D : Node_Id)
     return Supported_Concurrency_Control_Protocol
   is
      C_Name : Name_Id;
   begin
      pragma Assert (AINU.Is_Data (D));

      if Is_Defined_Enumeration_Property (D, Data_Concurrency_Protocol) then
         C_Name := Get_Enumeration_Property (D, Data_Concurrency_Protocol);

         if C_Name = Concurrency_NoneSpecified_Name then
            return Concurrency_NoneSpecified;

         elsif C_Name = Concurrency_Read_Only_Name then
            return Concurrency_Read_Only;

         elsif C_Name = Concurrency_Protected_Access_Name then

            return Concurrency_Protected_Access;

         elsif C_Name = Concurrency_Priority_Ceiling_Name then

            return Concurrency_Priority_Ceiling;

         elsif C_Name = Concurrency_Priority_Ceiling_Protocol_Name then

            return Concurrency_Priority_Ceiling;

         else
            Display_Located_Error
              (AIN.Loc (D),
               "Unknown concurrency protocol",
               Fatal => True);
            return Concurrency_NoneSpecified;
         end if;
      else
         return Concurrency_NoneSpecified;
      end if;
   end Get_Concurrency_Protocol;

   -------------------------
   -- Get_Source_Language --
   -------------------------

   function Get_Source_Language
     (E : Node_Id)
     return Supported_Source_Language
   is
      Source_L : Name_Id;
   begin
      if Is_Defined_Enumeration_Property (E, Source_Language) then
         Source_L := Get_Enumeration_Property (E, Source_Language);

         if Source_L = Language_Ada_95_Name
           or else Source_L = Language_Ada_Name
           or else Source_L = Language_Ada_05_Name
         then
            --  All instances of Ada are aliased to Ada_95
            return Language_Ada_95;

         elsif Source_L = Language_ASN1_Name then
            return Language_ASN1;

         elsif Source_L = Language_Lustre_Name
           or else Source_L = Language_Lustre5_Name
           or else Source_L = Language_Lustre6_Name
           or else Source_L = Language_SCADE6_Name
         then
            return Language_Lustre;

         elsif Source_L = Language_Esterel_Name then
            return Language_Esterel;

         elsif Source_L = Language_SDL_Name then
            return Language_SDL;

         elsif Source_L = Language_C_Name then
            return Language_C;

         elsif Source_L = Language_RTSJ_Name then
            return Language_RTSJ;

         elsif Source_L = Language_Simulink_Name then
            return Language_Simulink;

         elsif Source_L = Language_Scade_Name then
            return Language_Scade;

         elsif Source_L = Language_Rhapsody_Name then
            return Language_Rhapsody;

         elsif Source_L = Language_GUI_Name then
            return Language_GUI;

         else
            Display_Located_Error
              (AIN.Loc (E),
               "Unknown source language",
               Fatal => True);
            return Language_None;
         end if;
      else
         return Language_None;
      end if;
   end Get_Source_Language;

   -------------------------
   -- Get_Subprogram_Kind --
   -------------------------

   function Get_Subprogram_Kind
     (S : Node_Id)
     return Supported_Subprogram_Kind
   is
      Language   : constant Supported_Source_Language :=
        Get_Source_Language (S);
      Src_Name   : constant Name_Id := Get_Source_Name (S);
      T_Src_Name : constant Name_Id := Get_Transfo_Source_Name (S);
      Src_Files  : constant Name_Array := Get_Source_Text (S);
   begin
      case Language is
         when Language_Ada_95 =>
            if Src_Name /= No_Name or else Src_Files'Length > 0 then
               if not Is_Empty (AIN.Calls (S)) and then
                 not Is_Empty (AIN.Subprogram_Calls
                                 (AIN.First_Node (AIN.Calls (S))))
               then
                  --  A subprogram having Ada 95 as implementation
                  --  language, an implementation name and a *non
                  --  null* call sequence list is a hybrid Ada 95
                  --  subprogram.

                  return Subprogram_Hybrid_Ada_95;
               else
                  --  A subprogram having Ada 95 as implementation
                  --  language, an implementation name and a *null*
                  --  call sequence list is an opaque Ada 95
                  --  subprogram.

                  return Subprogram_Opaque_Ada_95;
               end if;
            elsif T_Src_Name /= No_Name then

               return Subprogram_Opaque_Ada_95_Transfo;
            else
               --  A subprogram having Ada 95 as implementation
               --  language and a null source name and source text is
               --  a wrong built subprogram.

               return Subprogram_Unknown;
            end if;

         when Language_Lustre =>
            if not Is_Empty (AIN.Calls (S))
              and then not Is_Empty (AIN.Subprogram_Calls
                                       (AIN.First_Node (AIN.Calls (S))))
            then
               --  A subprogram having Lustre as implementation
               --  language, an implementation name and a *non
               --  null* call sequence list is not supported yet.

               return Subprogram_Unknown;
            else
               --  A subprogram having Lustre as implementation
               --  language, an implementation name and a *null*
               --  call sequence list is a Lustre Subprogram.
               --  Lustre subprogram are implemented in a
               --  different way in the backends. In PolyORB-HI-Ada
               --  it was used with ASN1 in the IST-ASSERT
               --  process. In POK, we generate glue code
               --  to call Lustre application code.

               return Subprogram_Lustre;
            end if;

         when Language_Esterel =>
            return Subprogram_Esterel;

         when Language_ASN1 =>
            --  A subprogram having ASN1 as implementation
            --  language is not supported.

            return Subprogram_Unknown;

         when Language_SDL =>
            --  A subprogram having SDL as implementation
            --  language is not supported.

            return Subprogram_Unknown;

         when Language_C =>
            if Src_Name /= No_Name or else Src_Files'Length > 0 then
               if not Is_Empty (AIN.Calls (S)) and then
                 not Is_Empty (AIN.Subprogram_Calls
                                 (AIN.First_Node (AIN.Calls (S))))
               then
                  --  A subprogram having C as implementation
                  --  language, an implementation name and a *non
                  --  null* call sequence list is not supported yet.

                  return Subprogram_Unknown;
               else
                  --  A subprogram having C as implementation
                  --  language, an implementation name and a *null*
                  --  call sequence list is an opaque C subprogram.

                  return Subprogram_Opaque_C;
               end if;
            else
               --  A subprogram having C as implementation language
               --  and a null source name and a null source text is a
               --  wrong built subprogram.

               return Subprogram_Unknown;
            end if;

         when Language_RTSJ =>
            if Src_Name /= No_Name or else Src_Files'Length > 0 then
               if not Is_Empty (AIN.Calls (S)) and then
                 not Is_Empty (AIN.Subprogram_Calls
                                 (AIN.First_Node (AIN.Calls (S))))
               then
                  --  A subprogram having RTSJ as implementation
                  --  language, an implementation name and a *non
                  --  null* call sequence list is not supported yet.

                  return Subprogram_Unknown;
               else
                  --  A subprogram having RTSJ as implementation
                  --  language, an implementation name and a *null*
                  --  call sequence list is an opaque RTSJ subprogram

                  return Subprogram_Opaque_RTSJ;
               end if;
            else
               --  A subprogram having RTSJ as implementation language
               --  and a null source name and a null source text is a
               --  wrong built subprogram.

               return Subprogram_Unknown;
            end if;

         when Language_Simulink =>
            return Subprogram_Simulink;

         when Language_Scade =>
            return Subprogram_Scade;

         when Language_None =>
            if Src_Name /= No_Name or else Src_Files'Length > 0 then
               --  A subprogram having no implementation source
               --  language but a non null source name or an non null
               --  source text is a wrong built subprogram.

               return Subprogram_Unknown;
            else
               if not Is_Empty (AIN.Calls (S)) and then
                 not Is_Empty (AIN.Subprogram_Calls
                                 (AIN.First_Node (AIN.Calls (S))))
               then
                  --  A subprogram having no implementation language,
                  --  no implementation name and a pure call sequence
                  --  subprogram. However the length of its call
                  --  sequence has to be exactly 1.

                  if Length (AIN.Calls (S)) = 1 then
                     return Subprogram_Pure_Call_Sequence;
                  else
                     return Subprogram_Unknown;
                  end if;
               else
                  --  A subprogram having no implementation language
                  --  and a *null* call sequence list is an empty
                  --  subprogram.

                  return Subprogram_Empty;
               end if;
            end if;

         when Language_GUI
           | Language_Rhapsody =>
            return Subprogram_Unknown;
      end case;
   end Get_Subprogram_Kind;

   -----------------
   -- Is_Fusioned --
   -----------------

   function Is_Fusioned (E : Node_Id) return Boolean is
   begin
      if Is_Defined_Boolean_Property (E, Fusion_Occurred) then
         return Get_Boolean_Property (E, Fusion_Occurred);
      else
         return false;
      end if;
   end Is_Fusioned;

   --------------------------
   -- Get_Thread_Scheduler --
   --------------------------

   function Get_Thread_Scheduler (E : Node_Id) return Name_Id is
   begin
      if Is_Defined_String_Property (E, Scheduler_Name) then
         return Get_String_Property (E, Scheduler_Name);
      else
         return No_Name;
      end if;
   end Get_Thread_Scheduler;

   -------------------------------
   -- Get_Thread_Reference_Name --
   -------------------------------

   function Get_Thread_Reference_Name (E : Node_Id) return Name_Id is
   begin
      if Is_Defined_String_Property (E, Original_Name) then
         return Get_String_Property (E, Original_Name);
      else
         return No_Name;
      end if;
   end Get_Thread_Reference_Name;

   -------------------------
   -- Is_Priority_Shifter --
   -------------------------

   function Is_Priority_Shifter  (E : Node_Id) return Boolean is
   begin
      if Is_Defined_Boolean_Property (E, Priority_Shifter) then
         return Get_Boolean_Property (E, Priority_Shifter);
      else
         return false;
      end if;
   end Is_Priority_Shifter;

   ---------------------
   -- Get_Source_Name --
   ---------------------

   function Get_Source_Name (E : Node_Id) return Name_Id is
   begin
      if Is_Defined_String_Property (E, Source_Name) then
         return Get_String_Property (E, Source_Name);
      else
         return No_Name;
      end if;
   end Get_Source_Name;

   -----------------------------
   -- Get_Transfo_Source_Name --
   -----------------------------

   function Get_Transfo_Source_Name (E : Node_Id) return Name_Id is
   begin
      if Is_Defined_String_Property (E, T_Source_Name) then
         return Get_String_Property (E, T_Source_Name);
      else
         return No_Name;
      end if;
   end Get_Transfo_Source_Name;

   --------------------------
   -- Get_Type_Source_Name --
   --------------------------

   function Get_Type_Source_Name (E : Node_Id) return Name_Id is
   begin
      if Is_Defined_String_Property (E, Type_Source_Name) then
         return Get_String_Property (E, Type_Source_Name);
      else
         return No_Name;
      end if;
   end Get_Type_Source_Name;

   ---------------------
   -- Get_Source_Text --
   ---------------------

   function Get_Source_Text (E : Node_Id) return Name_Array is
      T_List : List_Id;
   begin
      if Is_Defined_List_Property (E, Source_Text) then
         T_List := Get_List_Property (E, Source_Text);

         declare
            use Ocarina.AADL_Values;

            L   : constant Nat := Nat (ATNU.Length (T_List));
            Res : Name_Array (1 .. L);
            N   : Node_Id;
         begin
            N := ATN.First_Node (T_List);

            for J in Res'Range loop
               Res (J) := Value (Value (N)).SVal;
               N := ATN.Next_Node (N);
            end loop;

            return Res;
         end;
      else
         return Empty_Name_Array;
      end if;
   end Get_Source_Text;

   ----------------------------------
   -- Get_Thread_Dispatch_Protocol --
   ----------------------------------

   function Get_Thread_Dispatch_Protocol
     (T : Node_Id)
     return Supported_Thread_Dispatch_Protocol
   is
      P_Name : Name_Id;
   begin
      pragma Assert (Is_Thread (T));

      if Is_Defined_Enumeration_Property (T, Thread_Dispatch_Protocol) then
         P_Name :=  Get_Enumeration_Property (T, Thread_Dispatch_Protocol);

         --  Although Name_Id is a scalar type, we cannot use a switch
         --  case since the <..>_Name global variables are not (and
         --  cannot be) static.

         if P_Name = Thread_Periodic_Name then
            if not Is_Defined_Integer_Property (T, Thread_Period) then
               Display_Located_Error
                 (AIN.Loc (T),
                  "Periodic threads must have a period",
                  Fatal => True);
            end if;

            return Thread_Periodic;

         elsif P_Name = Thread_Aperiodic_Name then
            return Thread_Aperiodic;

         elsif P_Name = Thread_Sporadic_Name then
            if not Is_Defined_Integer_Property (T, Thread_Period) then
               Display_Located_Error
                 (AIN.Loc (T),
                  "Sporadic threads must have a period",
                  Fatal => True);
            end if;

            return Thread_Sporadic;

         elsif P_Name = Thread_Hybrid_Name then
            if not Is_Defined_Integer_Property (T, Thread_Period) then
               Display_Located_Error
                 (AIN.Loc (T),
                  "Hybrid threads must have a period",
                  Fatal => True);
            end if;

            return Thread_Hybrid;

         elsif P_Name = Thread_Background_Name then
            return Thread_Background;

         else
            Display_Located_Error
              (AIN.Loc (T),
               "Unknown thread dispatch protocol",
               Fatal => True);
            return Thread_None;
         end if;
      else
         return Thread_None;
      end if;
   end Get_Thread_Dispatch_Protocol;

   --------------------------------
   -- Convert_Value_To_Time_Type --
   --------------------------------

   function Convert_Value_To_Time_Type (V : Node_Id)
            return Time_Type is
      N      : Name_Id;
      Result : Time_Type;
      U      : Node_Id;
   begin
      U := Unit_Identifier (V);

      --  Get the value

      Result.T := ATEP.Get_Integer_Of_Property_Value (V);

      --  Convert the value to its unit

      N := ATN.Name (U);

      if N = Time_Ps_Name then
         Result.U := Picosecond;
      elsif N = Time_Ns_Name then
         Result.U := Nanosecond;
      elsif N = Time_Us_Name then
         Result.U := Microsecond;
      elsif N = Time_Ms_Name then
         Result.U := Millisecond;
      elsif N = Time_Sec_Name then
         Result.U := Second;
      elsif N = Time_Min_Name then
         Result.U := Minute;
      elsif N = Time_Hr_Name then
         Result.U := Hour;
      else
         Display_Located_Error
           (AIN.Loc (V), "Unsupported unit", Fatal => True);
      end if;

      return Result;
   end Convert_Value_To_Time_Type;

   -----------------------------
   -- Get_Time_Property_Value --
   -----------------------------

   function Get_Time_Property_Value
     (E             : Node_Id;
      Property_Name : Name_Id)
     return Time_Type
   is
      Result : Time_Type := Null_Time;
      V      : Node_Id;
   begin
      V := Get_Value_Of_Property_Association (E, Property_Name);

      if Present (V) then
         if Present (Unit_Identifier (V)) then
            Result := Convert_Value_To_Time_Type (V);
         else
            Display_Located_Error
              (AIN.Loc (E), "Time without unit", Fatal => True);
         end if;
      end if;

      return Result;
   end Get_Time_Property_Value;

   -------------------------
   -- Get_Dispatch_Offset --
   -------------------------

   function Get_Dispatch_Offset (T : Node_Id) return Time_Type is
   begin
      pragma Assert (Is_Thread (T));

      case Get_Thread_Dispatch_Protocol (T) is
         when Thread_Periodic =>
            return Get_Time_Property_Value (T, Dispatch_Offset);

         when others =>
            Display_Located_Error
              (AIN.Loc (T),
               "This kind of thread does not have a dispatch offset",
               Fatal => True);
            return ((0, Picosecond));
      end case;
   end Get_Dispatch_Offset;

   -----------------------
   -- Get_Thread_Period --
   -----------------------

   function Get_Thread_Period (T : Node_Id) return Time_Type is
   begin
      pragma Assert (Is_Thread (T));

      case Get_Thread_Dispatch_Protocol (T) is
         when Thread_Periodic | Thread_Sporadic | Thread_Hybrid =>
            --  We are sure the thread has a period

            return Get_Time_Property_Value (T, Thread_Period);

         when others =>
            Display_Located_Error
              (AIN.Loc (T),
               "This kind of thread does not have a period",
               Fatal => True);
            return ((0, Picosecond));
      end case;
   end Get_Thread_Period;

   -------------------------
   -- Get_Thread_Deadline --
   -------------------------

   function Get_Thread_Deadline (T : Node_Id) return Time_Type is
   begin
      pragma Assert (Is_Thread (T));

      case Get_Thread_Dispatch_Protocol (T) is
         when Thread_Periodic | Thread_Sporadic | Thread_Hybrid =>
            if Is_Defined_Property (T, Thread_Deadline) then
               return Get_Time_Property_Value (T, Thread_Deadline);
            else
               --  We are sure the thread has a period

               return Get_Thread_Period (T);
            end if;

         when others =>
            Display_Located_Error
              (AIN.Loc (T),
               "This kind of thread does not have a deadline",
               Fatal => True);
            return ((0, Picosecond));
      end case;
   end Get_Thread_Deadline;

   ------------------
   -- Get_Priority --
   ------------------

   function Get_Priority (E : Node_Id) return Unsigned_Long_Long is
      use Ocarina.AADL_Values;

      Min_Priority : Unsigned_Long_Long := 0;
      Max_Priority : Unsigned_Long_Long := 0;

      procedure Update_Priority_Bounds (P : Name_Id);
      --  Check that the priority type corresponding to E has explicit
      --  bounds and set Max_Priority and Min_Priority
      --  accordingly.

      ----------------------------
      -- Update_Priority_Bounds --
      ----------------------------

      procedure Update_Priority_Bounds (P : Name_Id) is
         use Ocarina.ME_AADL;

         Property            : constant Node_Id :=
           Find_Property_Association_From_Name (AIN.Properties (E), P);
         Property_Type       : Node_Id          := No_Node;
         Property_Type_Range : Node_Id          := No_Node;
         Process_Inst        : Node_Id;
         Processor_Inst      : Node_Id          := No_Node;
      begin
         case AADL_Version is
            when AADL_V1 =>
               Property_Type := Expanded_Type_Designator (Property_Name_Type
                                      (Entity (AIN.Property_name (Property))));
               Property_Type_Range := Type_Range (Property_Type);

            when AADL_V2 =>

               Process_Inst := Parent_Subcomponent
                 (Parent_Component (Parent_Subcomponent (E)));

               if Present (Process_Inst) then
                  if Get_Category_Of_Component (Process_Inst) = CC_Thread then
                     Process_Inst := Parent_Subcomponent
                       (Parent_Component (Process_Inst));
                  end if;
                  Processor_Inst := Get_Bound_Processor
                    (Corresponding_Instance (Process_Inst));

                  if Is_Defined_Range_Property (Processor_Inst,
                                                Get_String_Name
                                                  ("priority_range"))
                  then
                     Property_Type :=
                       (AIN.Property_Association_Value
                          (AIEP.Find_Property_Association_From_Name
                             (Property_List => AIN.Properties (Processor_Inst),
                              Property_Name => Get_String_Name
                                ("priority_range"))));

                     Property_Type_Range := Single_Value (Property_Type);
                  else
                     Display_Located_Error
                       (AIN.Loc (Processor_Inst),
                        "Priority_Range property is not defined",
                        Fatal => False,
                        Warning => True);
                  end if;
               end if;
         end case;

         if No (Property_Type_Range) then
            --  In this case, we define a fake interval

            Min_Priority := 1;
            Max_Priority := 0;
         else
            Min_Priority := Value (Value (Number_Value (Lower_Bound
                                                 (Property_Type_Range)))).IVal;

            Max_Priority := Value (Value (Number_Value (Upper_Bound
                                                 (Property_Type_Range)))).IVal;
         end if;
      end Update_Priority_Bounds;

      Priority : Unsigned_Long_Long;

   begin
      if Is_Defined_Integer_Property (E, AADL_Priority) then
         Update_Priority_Bounds (AADL_Priority);

         Priority := Get_Integer_Property (E, AADL_Priority);

      elsif Is_Defined_Integer_Property (E, Thread_Cheddar_Priority) then
         Update_Priority_Bounds (Thread_Cheddar_Priority);

         Priority := Get_Integer_Property (E, Thread_Cheddar_Priority);

      else
         Priority := 0;
      end if;

      if Max_Priority /= 0 and then
        (Priority > Max_Priority
           or else Priority < Min_Priority)
      then
         Display_Located_Error
           (AIN.Loc (E),
            "Priority not in priority interval set by Priority_Range by"
              & " hosting processor (["
              & Min_Priority'Img & " .. " & Max_Priority'Img & " ])",
            Fatal => True);
      end if;

      return Priority;
   end Get_Priority;

   -------------------------
   -- Get_Thread_Priority --
   -------------------------

   function Get_Thread_Priority (T : Node_Id) return Unsigned_Long_Long is
   begin
      pragma Assert (Is_Thread (T));

      return Get_Priority (T);
   end Get_Thread_Priority;

   ---------------------------
   -- Get_Thread_Stack_Size --
   ---------------------------

   function Get_Thread_Stack_Size (T : Node_Id) return Size_Type is
   begin
      pragma Assert (Is_Thread (T));

      return (Get_Size_Property_Value (T, Thread_Stack_Size));
   end Get_Thread_Stack_Size;

   ------------------------------------
   -- Get_Thread_Implementation_Kind --
   ------------------------------------

   function Get_Thread_Implementation_Kind
     (T : Node_Id)
     return Supported_Thread_Implementation
   is
      Result : Supported_Thread_Implementation := Thread_Unknown;
      CS_Cnt : Natural := 0;
   begin
      pragma Assert (Is_Thread (T));

      --  See whether the thread IN ports have their own compute
      --  entrypoints.
      --  Can be call sequences

      if not Is_Empty (AIN.Features (T)) and then Has_In_Ports (T) then
         declare
            F         : Node_Id := AIN.First_Node (AIN.Features (T));
            All_Match : Boolean := True;
            One_Match : Boolean := False;
         begin
            while Present (F) loop
               if Kind (F) = K_Port_Spec_Instance
                 and then AIN.Is_In (F)
                 and then AIN.Is_Event (F)
                 and then AIN.Loc (F) /= No_Location
               then
                  One_Match := One_Match
                    or else Is_Defined_Entrypoint_Property (F);

                  All_Match := All_Match
                    and then Is_Defined_Entrypoint_Property (F);

               elsif Kind (F) = K_Port_Spec_Instance
                 and then AIn.Is_Out (F)
                 and then Is_Defined_Entrypoint_Property (F)
               then
                  Display_Located_Error
                    (AIN.Loc (F),
                     "You cannot specify Compute_Entrypoint property"
                     & " for a NON-in port",
                     Fatal => True);
               elsif  Kind (F) = K_Port_Spec_Instance
                 and then AIN.Is_Data (F)
                 and then not AIN.Is_Event (F)
                 and then Is_Defined_Entrypoint_Property (F)
               then
                  Display_Located_Error
                    (AIN.Loc (F),
                     "You cannot specify Compute_Entrypoint property"
                     & " for a NON-event port",
                     Fatal => True);
               end if;

               F := AIN.Next_Node (F);
            end loop;

            if One_Match and then All_Match then
               Result := Thread_With_Port_Compute_Entrypoint;

            elsif One_Match then
               Display_Located_Error
                 (AIN.Loc (T),
                  "You should specify a compute entrypoint for all IN "
                  & "EVENT ports or else for NONE of them",
                  Fatal => True);
            end if;
         end;
      end if;

      if not Is_Empty (AIN.Calls (T)) then

         --  A thread must have either
         --  a single call sequence
         --  multiple call sequences and an entrypoint

         declare
            Call_Seq : Node_Id := AIN.First_Node (AIN.Calls (T));
         begin
            while Present (Call_Seq) loop
               if Length (AIN.Subprogram_Calls (Call_Seq)) > 1
                  and then Get_Current_Backend_Kind /= PolyORB_Kernel_C then
                  Display_Located_Error
                    (AIN.Loc (Call_Seq),
                     "Multiple subprogram calls in the thread call sequence"
                     & " are not supported. You should encapsulate them in"
                     & " a wrapper subprogram.",
                     Fatal => True);
               end if;

               Call_Seq := AIN.Next_Node (Call_Seq);
            end loop;

            CS_Cnt := CS_Cnt + 1;
         end;
      end if;

      if Result /= Thread_With_Port_Compute_Entrypoint then
         --  Thread_With_Port_Compute_Entryopoint takes precedence

         if Is_Defined_Entrypoint_Property (T) then
            --  See whether the thread itself has a compute entrypoint

            Result := Thread_With_Compute_Entrypoint;
         elsif CS_Cnt >= 1 then
            Result := Thread_With_Call_Sequence;
         end if;
      end if;

      return Result;
   end Get_Thread_Implementation_Kind;

   -----------------------------------
   -- Get_Thread_Compute_Entrypoint --
   -----------------------------------

   function Get_Thread_Compute_Entrypoint
     (T       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Name_Id
     renames Get_Compute_Entrypoint;

   -----------------------------------
   -- Get_Thread_Compute_Entrypoint --
   -----------------------------------

   function Get_Thread_Compute_Entrypoint
     (T       : Node_Id;
      In_Mode : Name_Id := No_Name)
     return Node_Id
     renames Get_Compute_Entrypoint;

   ------------------------
   -- Get_Implementation --
   ------------------------

   function Get_Implementation (E : Node_Id) return Node_Id is
   begin
      if Is_Defined_Property (E, Implemented_As) then
         return Get_Classifier_Property (E, Implemented_As);
      else
         return No_Node;
      end if;
   end Get_Implementation;

   --------------------------------------
   -- Get_Thread_Initialize_Entrypoint --
   --------------------------------------

   function Get_Thread_Initialize_Entrypoint (T : Node_Id) return Name_Id is
   begin
      if Is_Defined_String_Property (T, Initialize_Entrypoint) then
         return Get_String_Property (T, Initialize_Entrypoint);
      elsif Is_Defined_String_Property
               (T, Initialize_Entrypoint_Source_Text) then
         return Get_String_Property
               (T, Initialize_Entrypoint_Source_Text);
      else
         return No_Name;
      end if;
   end Get_Thread_Initialize_Entrypoint;

   --------------------------------------
   -- Get_Thread_Initialize_Entrypoint --
   --------------------------------------

   function Get_Thread_Initialize_Entrypoint (T : Node_Id) return Node_Id is
   begin
      if Is_Defined_Property (T, Initialize_Entrypoint) then
         return Get_Classifier_Property (T, Initialize_Entrypoint);
      else
         return No_Node;
      end if;
   end Get_Thread_Initialize_Entrypoint;

   -----------------------------------
   -- Get_Thread_Recover_Entrypoint --
   -----------------------------------

   function Get_Thread_Recover_Entrypoint (T : Node_Id) return Name_Id is
   begin
      if Is_Defined_String_Property (T, Recover_Entrypoint) then
         return Get_String_Property (T, Recover_Entrypoint);
      elsif Is_Defined_String_Property
               (T, Recover_Entrypoint_Source_Text) then
         return Get_String_Property
               (T, Recover_Entrypoint_Source_Text);
      else
         return No_Name;
      end if;
   end Get_Thread_Recover_Entrypoint;

   -----------------------------------
   -- Get_Thread_Recover_Entrypoint --
   -----------------------------------

   function Get_Thread_Recover_Entrypoint (T : Node_Id) return Node_Id is
   begin
      if Is_Defined_Property (T, Recover_Entrypoint) then
         return Get_Classifier_Property (T, Recover_Entrypoint);
      else
         return No_Node;
      end if;
   end Get_Thread_Recover_Entrypoint;

   ------------------
   -- Get_Location --
   ------------------

   function Get_Location (P : Node_Id) return Name_Id is
   begin
      pragma Assert (AINU.Is_Processor (P) or else AINU.Is_Device (P));

      if not Is_Defined_String_Property (P, Location) then
         return No_Name;
      end if;

      return Get_String_Property (P, Location);
   end Get_Location;

   ---------------------
   -- Get_Port_Number --
   ---------------------

   function Get_Port_Number (P : Node_Id) return Value_Id is
      use Ocarina.AADL_Values;
   begin
      pragma Assert (Is_Process (P) or else Is_Device (P));

      if not Is_Defined_Integer_Property (P, Port_Number) then
         return No_Value;
      end if;

      return New_Integer_Value
        (Unsigned_Long_Long
         (Get_Integer_Property
          (P, Port_Number)));
   end Get_Port_Number;

   --------------------
   -- Get_Process_Id --
   --------------------

   function Get_Process_Id (P : Node_Id) return Value_Id is
      use Ocarina.AADL_Values;
   begin
      pragma Assert (Is_Process (P));

      if not Is_Defined_Integer_Property (P, Process_Id) then
         return No_Value;
      end if;

      return New_Integer_Value
        (Unsigned_Long_Long
         (Get_Integer_Property
          (P, Process_Id)));
   end Get_Process_Id;

   -------------------------
   -- Get_Channel_Address --
   -------------------------

   function Get_Channel_Address (P : Node_Id) return Value_Id is
      use Ocarina.AADL_Values;
   begin
      pragma Assert (Is_Process (P));

      if not Is_Defined_Integer_Property (P, Process_Channel_Address) then
         return No_Value;
      end if;

      return New_Integer_Value
        (Unsigned_Long_Long
         (Get_Integer_Property
          (P, Process_Channel_Address)));
   end Get_Channel_Address;

   -------------------------
   -- Get_Bound_Processor --
   -------------------------

   function Get_Bound_Processor (P : Node_Id) return Node_Id is
   begin
      pragma Assert (Is_Process_Or_Device (P));

      if not Is_Defined_Reference_Property (P, Processor_Binding)
        and then Is_Process (P)
      then
         if Get_Current_Backend_Kind = Petri_Nets then
            --  optional for this backend
            return No_Node;
         else
            Display_Located_Error
              (AIN.Loc (Parent_Subcomponent (P)),
               "This process has to be bound to a processor",
               Fatal => True);
         end if;
      end if;

      return Get_Reference_Property (P, Processor_Binding);
   end Get_Bound_Processor;

   ----------------------
   -- Get_Bound_Memory --
   ----------------------

   function Get_Bound_Memory (P : Node_Id) return Node_Id is
   begin
      pragma Assert (Is_Process_Or_Device (P));

      if Is_Defined_Reference_Property (P, Memory_Binding) then
         return Get_Reference_Property (P, Memory_Binding);
      else
         return No_Node;
      end if;
   end Get_Bound_Memory;

   -------------------
   -- Get_Bound_Bus --
   -------------------

   function Get_Bound_Bus
     (C : Node_Id;
      Check : Boolean := True)
     return Node_Id
   is
      Result_List : List_Id;
      Result      : Node_Id;
   begin
      pragma Assert (Kind (C) = K_Connection_Instance);

      --  Checks that the connection C can be bound to a bus

      if not Is_System (Parent_Component (C)) then
         return No_Node;
      end if;

      if not Is_Defined_List_Property (C, Connection_Binding) then
         if Check then
            Display_Located_Error
              (AIN.Loc (C),
               "This connection has to be bound to a bus",
               Fatal => True);
         else
            --  We do not enforce connection binding for the remaining
            --  generators.

            return No_Node;
         end if;
      end if;

      Result_List := Get_List_Property (C, Connection_Binding);

      if ATNU.Is_Empty (Result_List) then
         Display_Located_Error
           (AIN.Loc (C),
            "This connection is not bound to any bus",
            Fatal => True);
      end if;

      if ATNU.Length (Result_List) > 1 then
         Display_Located_Error
           (AIN.Loc (C),
            "This connection is bound to more than one bus",
            Fatal => True);
      end if;

      Result := ATE.Get_Referenced_Entity (ATN.First_Node (Result_List));

      pragma Assert (Is_Bus (Result) or else Is_Virtual_Bus (Result));

      return Result;
   end Get_Bound_Bus;

   ----------------------------
   -- Get_Execution_Platform --
   ----------------------------

   function Get_Execution_Platform
     (P : Node_Id)
     return Supported_Execution_Platform
   is
      P_Name    : Name_Id;
   begin
      pragma Assert (AINU.Is_Processor (P));

      if Is_Defined_Enumeration_Property (P, Execution_Platform) then
         P_Name := Get_Enumeration_Property (P, Execution_Platform);

         if P_Name = Platform_Native_Name then
            return Platform_Native;
         elsif P_Name = Platform_LEON_RTEMS_Name then
            return Platform_LEON_RTEMS;
         elsif P_Name = Platform_LEON_GNAT_Name then
            return Platform_LEON_GNAT;
         elsif P_Name = Platform_LEON_ORK_Name then
            return Platform_LEON_ORK;
         elsif P_Name = Platform_ERC32_ORK_Name then
            return Platform_ERC32_ORK;
         elsif P_Name = Platform_ARM_DSLINUX_Name then
            return Platform_ARM_DSLINUX;
         elsif P_Name = Platform_ARM_N770_Name then
            return Platform_ARM_N770;
         elsif P_Name = Platform_MARTE_OS_Name then
            return Platform_MARTE_OS;
         else
            Display_Located_Error
              (AIN.Loc (P),
               "Unknown execution platform",
               Fatal => True);
            return Platform_None;
         end if;
      else
         return Platform_None;
      end if;
   end Get_Execution_Platform;

   -----------------------
   -- Get_Transport_API --
   -----------------------

   function Get_Transport_API
     (B : Node_Id; E : Node_Id := No_Node)
     return Supported_Transport_APIs
   is
      T_Name : Name_Id;
      Root_Sys : Node_Id := No_Node;
      S : Node_Id;
   begin
      if No (B) then
         return Transport_None;
      end if;

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      pragma Assert (Is_Bus (B) or else Is_Virtual_Bus (B));
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      if Present (E) then
         Root_Sys := Parent_Component (Parent_Subcomponent (E));
      end if;

      if Is_Defined_Enumeration_Property (B, Transport_API) then

         --  Check whether the user specified a default transport API
         --  for the bus.

         T_Name := Get_Enumeration_Property (B, Transport_API);

         if T_Name = Transport_BSD_Sockets_Name then
            return Transport_BSD_Sockets;
         elsif T_Name = Transport_SpaceWire_Name then
            return Transport_SpaceWire;
         else
            Display_Located_Error
              (AIN.Loc (B),
               "Unknown transport layer",
               Fatal => True);
            return Transport_None;
         end if;

      elsif Present (Root_Sys)
        and then not AINU.Is_Empty (AIN.Subcomponents (Root_Sys))
      then
         --  Check whether this is a user-defined transport.
         --
         --  In this case, the user has to define a device
         --  connected to this bus.
         --
         --  Visit all devices attached to the parent system that
         --  share the same processor as process E.

         S := AIN.First_Node (AIN.Subcomponents (Root_Sys));
         while Present (S) loop
            if AINU.Is_Device (Corresponding_Instance (S))
              and then Get_Bound_Processor (Corresponding_Instance (S))
              = Get_Bound_Processor (E)
            then
               --  XXX incomplete
               return Transport_User;
            end if;
            S := AIN.Next_Node (S);
         end loop;

         Display_Located_Error
           (AIN.Loc (B),
            "Unknown transport layer",
            Fatal => True);
         return Transport_None;

      else
         return Transport_None;
      end if;
   end Get_Transport_API;

   --------------------
   -- Get_Queue_Size --
   --------------------

   function Get_Queue_Size (P : Node_Id) return Long_Long is
   begin
      pragma Assert (Kind (P) = K_Port_Spec_Instance
                       and then AIN.Is_Event (P));

      if Is_Defined_Integer_Property (P, Queue_Size) then
         return Long_Long (Get_Integer_Property (P, Queue_Size));
      else
         return -1;
      end if;
   end Get_Queue_Size;

   ---------------------
   -- Get_Port_Timing --
   ---------------------

   function Get_Port_Timing (P : Node_Id) return Supported_Port_Timing is
      T_Name : Name_Id;
   begin
      if Is_Defined_Enumeration_Property (P, Port_Timing) then
         T_Name := Get_Enumeration_Property (P, Port_Timing);

         if T_Name = Port_Timing_Sampled_Name then
            return Port_Timing_Sampled;
         elsif T_Name = Port_Timing_Immediate_Name then
            return Port_Timing_Immediate;
         elsif T_Name = Port_Timing_Delayed_Name then
            return Port_Timing_Delayed;
         else
            Display_Located_Error
              (AIN.Loc (P),
               "Unknown port timing name",
               Fatal => True);
            return Port_Timing_None;
         end if;
      else
         return Port_Timing_None;
      end if;
   end Get_Port_Timing;

   ----------------------
   -- Get_Port_Urgency --
   ----------------------

   function Get_Port_Urgency (P : Node_Id) return Unsigned_Long_Long is
   begin
      if Is_Defined_Integer_Property (P, Port_Urgency) then
         return Get_Integer_Property (P, Port_Urgency);
      else
         return 0;
      end if;
   end Get_Port_Urgency;

   ---------------------------------
   -- Get_Port_Compute_Entrypoint --
   ---------------------------------

   function Get_Port_Compute_Entrypoint
     (P : Node_Id; In_Mode : Name_Id := No_Name) return Name_Id is
   begin
      if not AIN.Is_In (P) then
         Display_Located_Error
           (AIN.Loc (P),
            "Compute entrypoint cannot be specified for OUT-only ports",
            Fatal => True);
      end if;

      return Get_Compute_Entrypoint (P, In_Mode);
   end Get_Port_Compute_Entrypoint;

   ---------------------------------
   -- Get_Port_Compute_Entrypoint --
   ---------------------------------

   function Get_Port_Compute_Entrypoint
     (P : Node_Id; In_Mode : Name_Id := No_Name) return Node_Id is
   begin
      if not AIN.Is_In (P) then
         Display_Located_Error
           (AIN.Loc (P),
            "Compute entrypoint cannot be specified for OUT-only ports",
            Fatal => True);
      end if;

      return Get_Compute_Entrypoint (P, In_Mode);
   end Get_Port_Compute_Entrypoint;

   ------------------
   -- Get_Protocol --
   ------------------

   function Get_Protocol (S : Node_Id) return Protocol_Type is
      P_Name : Name_Id;
   begin
      pragma Assert (Is_System (S));

      if Is_Defined_Enumeration_Property (S, Protocol) then
         P_Name := Get_Enumeration_Property (S, Protocol);

         if P_Name = Protocol_IIOP_Name then
            return Protocol_IIOP;
         elsif P_Name = Protocol_DIOP_Name then
            return Protocol_DIOP;
         else
            Display_Located_Error
              (AIN.Loc (S),
               "Unknown protocol name",
               Fatal => True);
            return Protocol_None;
         end if;
      else
         return Protocol_None;
      end if;
   end Get_Protocol;

   --------------------
   -- Get_Word_Count --
   --------------------

   function Get_Word_Count (S : Node_Id) return Unsigned_Long_Long is
   begin
      pragma Assert (Is_Memory (S));

      if Is_Defined_Integer_Property (S, Word_Count) then
         return Get_Integer_Property (S, Word_Count);
      else
         return 0;
      end if;
   end Get_Word_Count;

   -------------------
   -- Get_Word_Size --
   -------------------

   function Get_Word_Size (S : Node_Id) return Size_Type is
   begin
      return (Get_Size_Property_Value (S, Word_Size));
   end Get_Word_Size;

   -----------------------------
   -- Get_Scheduling_Protocol --
   -----------------------------

   function Get_Scheduling_Protocol
     (P : Node_Id)
     return Supported_Scheduling_Protocol
   is
      use Ocarina.AADL_Values;
      Scheduling_L : List_Id;
      Scheduling_N : Name_Id;

   begin
      if Is_Defined_Enumeration_Property (P, Scheduling_Protocol) then
         Scheduling_L := Get_List_Property (P, Scheduling_Protocol);
         Scheduling_N := Value (Value (ATN.First_Node (Scheduling_L))).EVal;

         if Scheduling_N = PARAMETRIC_PROTOCOL_Name then
            return PARAMETRIC_PROTOCOL;

         elsif Scheduling_N = EARLIEST_DEADLINE_FIRST_PROTOCOL_Name then
            return EARLIEST_DEADLINE_FIRST_PROTOCOL;

         elsif Scheduling_N = LEAST_LAXITY_FIRST_PROTOCOL_Name then
            return LEAST_LAXITY_FIRST_PROTOCOL;

         elsif Scheduling_N = RATE_MONOTONIC_PROTOCOL_Name then
            return RATE_MONOTONIC_PROTOCOL;

         elsif Scheduling_N = DEADLINE_MONOTONIC_PROTOCOL_Name then
            return DEADLINE_MONOTONIC_PROTOCOL;

         elsif Scheduling_N = ROUND_ROBIN_PROTOCOL_Name then
            return ROUND_ROBIN_PROTOCOL;

         elsif Scheduling_N
           = TIME_SHARING_BASED_ON_WAIT_TIME_PROTOCOL_Name then
            return TIME_SHARING_BASED_ON_WAIT_TIME_PROTOCOL;

         elsif Scheduling_N
           = POSIX_1003_HIGHEST_PRIORITY_FIRST_PROTOCOL_Name then
            return POSIX_1003_HIGHEST_PRIORITY_FIRST_PROTOCOL;

         elsif Scheduling_N = D_OVER_PROTOCOL_Name then
            return D_OVER_PROTOCOL;

         elsif Scheduling_N
           = MAXIMUM_URGENCY_FIRST_BASED_ON_LAXITY_PROTOCOL_Name then
            return MAXIMUM_URGENCY_FIRST_BASED_ON_LAXITY_PROTOCOL;

         elsif Scheduling_N
           = MAXIMUM_URGENCY_FIRST_BASED_ON_DEADLINE_PROTOCOL_Name then
            return MAXIMUM_URGENCY_FIRST_BASED_ON_DEADLINE_PROTOCOL;

         elsif Scheduling_N
           = TIME_SHARING_BASED_ON_CPU_USAGE_PROTOCOL_Name then
            return TIME_SHARING_BASED_ON_CPU_USAGE_PROTOCOL;

         elsif Scheduling_N = NO_SCHEDULING_PROTOCOL_Name then
            return NO_SCHEDULING_PROTOCOL;

         elsif Scheduling_N = HIERARCHICAL_CYCLIC_PROTOCOL_Name then
            return HIERARCHICAL_CYCLIC_PROTOCOL;

         elsif Scheduling_N = HIERARCHICAL_ROUND_ROBIN_PROTOCOL_Name then
            return HIERARCHICAL_ROUND_ROBIN_PROTOCOL;

         elsif Scheduling_N
           = HIERARCHICAL_FIXED_PRIORITY_PROTOCOL_Name then
            return HIERARCHICAL_FIXED_PRIORITY_PROTOCOL;

         elsif Scheduling_N
           = HIERARCHICAL_PARAMETRIC_PROTOCOL_Name then
            return HIERARCHICAL_PARAMETRIC_PROTOCOL;

         else
            Display_Located_Error
              (AIN.Loc (P),
               "Unknown scheduling protocol",
               Fatal => True);
            return Unknown_Scheduler;
         end if;
      else
         return Unknown_Scheduler;
      end if;
   end Get_Scheduling_Protocol;

   ----------
   -- Init --
   ----------

   procedure Init is
   begin
      Source_Language    := Get_String_Name ("source_language");
      Source_Name        := Get_String_Name ("source_name");
      T_Source_Name      := Get_String_Name ("transformations::source_name");
      Type_Source_Name   := Get_String_Name ("type_source_name");
      Source_Text        := Get_String_Name ("source_text");
      Fusion_Occurred    := Get_String_Name
        ("transformations::fusion_occurred");
      Priority_Shifter   := Get_String_Name
        ("transformations::priority_shifter");
      Scheduler_Name     := Get_String_Name
        ("transformations::scheduler_name");
      Original_Name      := Get_String_Name
        ("transformations::original_name");