gcc/ada/libgnat/s-parint.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --            S Y S T E M . P A R T I T I O N _ I N T E R F A C E           --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                   (Dummy body for non-distributed case)                  --
   9 --                                                                          --
  10 --          Copyright (C) 1995-2017, Free Software Foundation, Inc.         --
  11 --                                                                          --
  12 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  15 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  18 --                                                                          --
  19 -- As a special exception under Section 7 of GPL version 3, you are granted --
  20 -- additional permissions described in the GCC Runtime Library Exception,   --
  21 -- version 3.1, as published by the Free Software Foundation.               --
  22 --                                                                          --
  23 -- You should have received a copy of the GNU General Public License and    --
  24 -- a copy of the GCC Runtime Library Exception along with this program;     --
  25 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  26 -- <http://www.gnu.org/licenses/>.                                          --
  27 --                                                                          --
  28 -- GNAT was originally developed  by the GNAT team at  New York University. --
  29 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 package body System.Partition_Interface is
  34
  35    pragma Warnings (Off); -- suppress warnings for unreferenced formals
  36
  37    M : constant := 7;
  38
  39    type String_Access is access String;
  40
  41    --  To have a minimal implementation of U'Partition_ID
  42
  43    type Pkg_Node;
  44    type Pkg_List is access Pkg_Node;
  45    type Pkg_Node is record
  46       Name          : String_Access;
  47       Subp_Info     : System.Address;
  48       Subp_Info_Len : Integer;
  49       Next          : Pkg_List;
  50    end record;
  51
  52    Pkg_Head : Pkg_List;
  53    Pkg_Tail : Pkg_List;
  54
  55    function getpid return Integer;
  56    pragma Import (C, getpid);
  57
  58    PID : constant Integer := getpid;
  59
  60    function Lower (S : String) return String;
  61
  62    Passive_Prefix : constant String := "SP__";
  63    --  String prepended in top of shared passive packages
  64
  65    procedure Check
  66      (Name    : Unit_Name;
  67       Version : String;
  68       RCI     : Boolean := True)
  69    is
  70    begin
  71       null;
  72    end Check;
  73
  74    -----------------------------
  75    -- Get_Active_Partition_Id --
  76    -----------------------------
  77
  78    function Get_Active_Partition_ID
  79      (Name : Unit_Name) return System.RPC.Partition_ID
  80    is
  81       P : Pkg_List := Pkg_Head;
  82       N : String   := Lower (Name);
  83
  84    begin
  85       while P /= null loop
  86          if P.Name.all = N then
  87             return Get_Local_Partition_ID;
  88          end if;
  89
  90          P := P.Next;
  91       end loop;
  92
  93       return M;
  94    end Get_Active_Partition_ID;
  95
  96    ------------------------
  97    -- Get_Active_Version --
  98    ------------------------
  99
 100    function Get_Active_Version (Name : Unit_Name) return String is
 101    begin
 102       return "";
 103    end Get_Active_Version;
 104
 105    ----------------------------
 106    -- Get_Local_Partition_Id --
 107    ----------------------------
 108
 109    function Get_Local_Partition_ID return System.RPC.Partition_ID is
 110    begin
 111       return System.RPC.Partition_ID (PID mod M);
 112    end Get_Local_Partition_ID;
 113
 114    ------------------------------
 115    -- Get_Passive_Partition_ID --
 116    ------------------------------
 117
 118    function Get_Passive_Partition_ID
 119      (Name : Unit_Name) return System.RPC.Partition_ID
 120    is
 121    begin
 122       return Get_Local_Partition_ID;
 123    end Get_Passive_Partition_ID;
 124
 125    -------------------------
 126    -- Get_Passive_Version --
 127    -------------------------
 128
 129    function Get_Passive_Version (Name : Unit_Name) return String is
 130    begin
 131       return "";
 132    end Get_Passive_Version;
 133
 134    ------------------
 135    -- Get_RAS_Info --
 136    ------------------
 137
 138    procedure Get_RAS_Info
 139      (Name          :  Unit_Name;
 140       Subp_Id       :  Subprogram_Id;
 141       Proxy_Address : out Interfaces.Unsigned_64)
 142    is
 143       LName : constant String := Lower (Name);
 144       N : Pkg_List;
 145    begin
 146       N := Pkg_Head;
 147       while N /= null loop
 148          if N.Name.all = LName then
 149             declare
 150                subtype Subprogram_Array is RCI_Subp_Info_Array
 151                  (First_RCI_Subprogram_Id ..
 152                   First_RCI_Subprogram_Id + N.Subp_Info_Len - 1);
 153                Subprograms : Subprogram_Array;
 154                for Subprograms'Address use N.Subp_Info;
 155                pragma Import (Ada, Subprograms);
 156             begin
 157                Proxy_Address :=
 158                  Interfaces.Unsigned_64 (Subprograms (Integer (Subp_Id)).Addr);
 159                return;
 160             end;
 161          end if;
 162          N := N.Next;
 163       end loop;
 164       Proxy_Address := 0;
 165    end Get_RAS_Info;
 166
 167    ------------------------------
 168    -- Get_RCI_Package_Receiver --
 169    ------------------------------
 170
 171    function Get_RCI_Package_Receiver
 172      (Name : Unit_Name) return Interfaces.Unsigned_64
 173    is
 174    begin
 175       return 0;
 176    end Get_RCI_Package_Receiver;
 177
 178    -------------------------------
 179    -- Get_Unique_Remote_Pointer --
 180    -------------------------------
 181
 182    procedure Get_Unique_Remote_Pointer
 183      (Handler : in out RACW_Stub_Type_Access)
 184    is
 185    begin
 186       null;
 187    end Get_Unique_Remote_Pointer;
 188
 189    -----------
 190    -- Lower --
 191    -----------
 192
 193    function Lower (S : String) return String is
 194       T : String := S;
 195
 196    begin
 197       for J in T'Range loop
 198          if T (J) in 'A' .. 'Z' then
 199             T (J) := Character'Val (Character'Pos (T (J)) -
 200                                     Character'Pos ('A') +
 201                                     Character'Pos ('a'));
 202          end if;
 203       end loop;
 204
 205       return T;
 206    end Lower;
 207
 208    -------------------------------------
 209    -- Raise_Program_Error_Unknown_Tag --
 210    -------------------------------------
 211
 212    procedure Raise_Program_Error_Unknown_Tag
 213      (E : Ada.Exceptions.Exception_Occurrence)
 214    is
 215    begin
 216       raise Program_Error with Ada.Exceptions.Exception_Message (E);
 217    end Raise_Program_Error_Unknown_Tag;
 218
 219    -----------------
 220    -- RCI_Locator --
 221    -----------------
 222
 223    package body RCI_Locator is
 224
 225       -----------------------------
 226       -- Get_Active_Partition_ID --
 227       -----------------------------
 228
 229       function Get_Active_Partition_ID return System.RPC.Partition_ID is
 230          P : Pkg_List := Pkg_Head;
 231          N : String   := Lower (RCI_Name);
 232
 233       begin
 234          while P /= null loop
 235             if P.Name.all = N then
 236                return Get_Local_Partition_ID;
 237             end if;
 238
 239             P := P.Next;
 240          end loop;
 241
 242          return M;
 243       end Get_Active_Partition_ID;
 244
 245       ------------------------------
 246       -- Get_RCI_Package_Receiver --
 247       ------------------------------
 248
 249       function Get_RCI_Package_Receiver return Interfaces.Unsigned_64 is
 250       begin
 251          return 0;
 252       end Get_RCI_Package_Receiver;
 253
 254    end RCI_Locator;
 255
 256    ------------------------------
 257    -- Register_Passive_Package --
 258    ------------------------------
 259
 260    procedure Register_Passive_Package
 261      (Name    : Unit_Name;
 262       Version : String := "")
 263    is
 264    begin
 265       Register_Receiving_Stub
 266         (Passive_Prefix & Name, null, Version, System.Null_Address, 0);
 267    end Register_Passive_Package;
 268
 269    -----------------------------
 270    -- Register_Receiving_Stub --
 271    -----------------------------
 272
 273    procedure Register_Receiving_Stub
 274      (Name          : Unit_Name;
 275       Receiver      : RPC_Receiver;
 276       Version       : String := "";
 277       Subp_Info     : System.Address;
 278       Subp_Info_Len : Integer)
 279    is
 280       N : constant Pkg_List :=
 281             new Pkg_Node'(new String'(Lower (Name)),
 282                           Subp_Info, Subp_Info_Len,
 283                           Next => null);
 284    begin
 285       if Pkg_Tail = null then
 286          Pkg_Head := N;
 287       else
 288          Pkg_Tail.Next := N;
 289       end if;
 290       Pkg_Tail := N;
 291    end Register_Receiving_Stub;
 292
 293    ---------
 294    -- Run --
 295    ---------
 296
 297    procedure Run
 298      (Main : Main_Subprogram_Type := null)
 299    is
 300    begin
 301       if Main /= null then
 302          Main.all;
 303       end if;
 304    end Run;
 305
 306    --------------------
 307    -- Same_Partition --
 308    --------------------
 309
 310    function Same_Partition
 311       (Left  : not null access RACW_Stub_Type;
 312        Right : not null access RACW_Stub_Type) return Boolean
 313    is
 314       pragma Unreferenced (Left);
 315       pragma Unreferenced (Right);
 316    begin
 317       return True;
 318    end Same_Partition;
 319
 320 end System.Partition_Interface;