gcc/ada/s-taprop-dummy.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --     S Y S T E M . T A S K _ P R I M I T I V E S . O P E R A T I O N S    --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --         Copyright (C) 1992-2005, Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNARL was developed by the GNARL team at Florida State University.       --
  30 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This is a no tasking version of this package
  35
  36 --  This package contains all the GNULL primitives that interface directly
  37 --  with the underlying OS.
  38
  39 pragma Polling (Off);
  40 --  Turn off polling, we do not want ATC polling to take place during
  41 --  tasking operations. It causes infinite loops and other problems.
  42
  43 with System.Error_Reporting;
  44 --  used for Shutdown
  45
  46 package body System.Task_Primitives.Operations is
  47
  48    use System.Tasking;
  49    use System.Parameters;
  50
  51    pragma Warnings (Off);
  52    --  Turn off warnings since so many unreferenced parameters
  53
  54    ----------------
  55    -- Abort_Task --
  56    ----------------
  57
  58    procedure Abort_Task (T : Task_Id) is
  59    begin
  60       null;
  61    end Abort_Task;
  62
  63    ----------------
  64    -- Check_Exit --
  65    ----------------
  66
  67    --  Dummy version
  68
  69    function Check_Exit (Self_ID : ST.Task_Id) return Boolean is
  70    begin
  71       return True;
  72    end Check_Exit;
  73
  74    --------------------
  75    -- Check_No_Locks --
  76    --------------------
  77
  78    function Check_No_Locks (Self_ID : ST.Task_Id) return Boolean is
  79    begin
  80       return True;
  81    end Check_No_Locks;
  82
  83    -------------------
  84    -- Current_State --
  85    -------------------
  86
  87    function Current_State (S : Suspension_Object) return Boolean is
  88    begin
  89       return False;
  90    end Current_State;
  91
  92    ----------------------
  93    -- Environment_Task --
  94    ----------------------
  95
  96    function Environment_Task return Task_Id is
  97    begin
  98       return null;
  99    end Environment_Task;
 100
 101    -----------------
 102    -- Create_Task --
 103    -----------------
 104
 105    procedure Create_Task
 106      (T          : Task_Id;
 107       Wrapper    : System.Address;
 108       Stack_Size : System.Parameters.Size_Type;
 109       Priority   : System.Any_Priority;
 110       Succeeded  : out Boolean)
 111    is
 112    begin
 113       Succeeded := False;
 114    end Create_Task;
 115
 116    ----------------
 117    -- Enter_Task --
 118    ----------------
 119
 120    procedure Enter_Task (Self_ID : Task_Id) is
 121    begin
 122       null;
 123    end Enter_Task;
 124
 125    ---------------
 126    -- Exit_Task --
 127    ---------------
 128
 129    procedure Exit_Task is
 130    begin
 131       null;
 132    end Exit_Task;
 133
 134    --------------
 135    -- Finalize --
 136    --------------
 137
 138    procedure Finalize (S : in out Suspension_Object) is
 139    begin
 140       null;
 141    end Finalize;
 142
 143    -------------------
 144    -- Finalize_Lock --
 145    -------------------
 146
 147    procedure Finalize_Lock (L : access Lock) is
 148    begin
 149       null;
 150    end Finalize_Lock;
 151
 152    procedure Finalize_Lock (L : access RTS_Lock) is
 153    begin
 154       null;
 155    end Finalize_Lock;
 156
 157    ------------------
 158    -- Finalize_TCB --
 159    ------------------
 160
 161    procedure Finalize_TCB (T : Task_Id) is
 162    begin
 163       null;
 164    end Finalize_TCB;
 165
 166    ------------------
 167    -- Get_Priority --
 168    ------------------
 169
 170    function Get_Priority (T : Task_Id) return System.Any_Priority is
 171    begin
 172       return 0;
 173    end Get_Priority;
 174
 175    --------------------
 176    -- Get_Thread_Id  --
 177    --------------------
 178
 179    function Get_Thread_Id (T : ST.Task_Id) return OSI.Thread_Id is
 180    begin
 181       return OSI.Thread_Id (T.Common.LL.Thread);
 182    end Get_Thread_Id;
 183
 184    ----------------
 185    -- Initialize --
 186    ----------------
 187
 188    procedure Initialize (Environment_Task : Task_Id) is
 189       No_Tasking : Boolean;
 190    begin
 191       No_Tasking :=
 192         System.Error_Reporting.Shutdown
 193           ("Tasking not implemented on this configuration");
 194    end Initialize;
 195
 196    procedure Initialize (S : in out Suspension_Object) is
 197    begin
 198       null;
 199    end Initialize;
 200
 201    ---------------------
 202    -- Initialize_Lock --
 203    ---------------------
 204
 205    procedure Initialize_Lock
 206      (Prio : System.Any_Priority;
 207       L    : access Lock)
 208    is
 209    begin
 210       null;
 211    end Initialize_Lock;
 212
 213    procedure Initialize_Lock (L : access RTS_Lock; Level : Lock_Level) is
 214    begin
 215       null;
 216    end Initialize_Lock;
 217
 218    --------------------
 219    -- Initialize_TCB --
 220    --------------------
 221
 222    procedure Initialize_TCB (Self_ID : Task_Id; Succeeded : out Boolean) is
 223    begin
 224       Succeeded := False;
 225    end Initialize_TCB;
 226
 227    -------------------
 228    -- Is_Valid_Task --
 229    -------------------
 230
 231    function Is_Valid_Task return Boolean is
 232    begin
 233       return False;
 234    end Is_Valid_Task;
 235
 236    --------------
 237    -- Lock_RTS --
 238    --------------
 239
 240    procedure Lock_RTS is
 241    begin
 242       null;
 243    end Lock_RTS;
 244
 245    ---------------------
 246    -- Monotonic_Clock --
 247    ---------------------
 248
 249    function Monotonic_Clock return Duration is
 250    begin
 251       return 0.0;
 252    end Monotonic_Clock;
 253
 254    --------------
 255    -- New_ATCB --
 256    --------------
 257
 258    function New_ATCB (Entry_Num : Task_Entry_Index) return Task_Id is
 259    begin
 260       return new Ada_Task_Control_Block (Entry_Num);
 261    end New_ATCB;
 262
 263    ---------------
 264    -- Read_Lock --
 265    ---------------
 266
 267    procedure Read_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
 268    begin
 269       Ceiling_Violation := False;
 270    end Read_Lock;
 271
 272    -----------------------------
 273    -- Register_Foreign_Thread --
 274    -----------------------------
 275
 276    function Register_Foreign_Thread return Task_Id is
 277    begin
 278       return null;
 279    end Register_Foreign_Thread;
 280
 281    -----------------
 282    -- Resume_Task --
 283    -----------------
 284
 285    function Resume_Task
 286      (T           : ST.Task_Id;
 287       Thread_Self : OSI.Thread_Id) return Boolean
 288    is
 289    begin
 290       return False;
 291    end Resume_Task;
 292
 293    -------------------
 294    -- RT_Resolution --
 295    -------------------
 296
 297    function RT_Resolution return Duration is
 298    begin
 299       return 10#1.0#E-6;
 300    end RT_Resolution;
 301
 302    ----------
 303    -- Self --
 304    ----------
 305
 306    function Self return Task_Id is
 307    begin
 308       return Null_Task;
 309    end Self;
 310
 311    ---------------
 312    -- Set_False --
 313    ---------------
 314
 315    procedure Set_False (S : in out Suspension_Object) is
 316    begin
 317       null;
 318    end Set_False;
 319
 320    ------------------
 321    -- Set_Priority --
 322    ------------------
 323
 324    procedure Set_Priority
 325      (T                   : Task_Id;
 326       Prio                : System.Any_Priority;
 327       Loss_Of_Inheritance : Boolean := False)
 328    is
 329    begin
 330       null;
 331    end Set_Priority;
 332
 333    --------------
 334    -- Set_True --
 335    --------------
 336
 337    procedure Set_True (S : in out Suspension_Object) is
 338    begin
 339       null;
 340    end Set_True;
 341
 342    -----------
 343    -- Sleep --
 344    -----------
 345
 346    procedure Sleep (Self_ID : Task_Id; Reason  : System.Tasking.Task_States) is
 347    begin
 348       null;
 349    end Sleep;
 350
 351    -----------------
 352    -- Stack_Guard --
 353    -----------------
 354
 355    procedure Stack_Guard (T : ST.Task_Id; On : Boolean) is
 356    begin
 357       null;
 358    end Stack_Guard;
 359
 360    ------------------
 361    -- Suspend_Task --
 362    ------------------
 363
 364    function Suspend_Task
 365      (T           : ST.Task_Id;
 366       Thread_Self : OSI.Thread_Id) return Boolean
 367    is
 368    begin
 369       return False;
 370    end Suspend_Task;
 371
 372    ------------------------
 373    -- Suspend_Until_True --
 374    ------------------------
 375
 376    procedure Suspend_Until_True (S : in out Suspension_Object) is
 377    begin
 378       null;
 379    end Suspend_Until_True;
 380
 381    -----------------
 382    -- Timed_Delay --
 383    -----------------
 384
 385    procedure Timed_Delay
 386      (Self_ID : Task_Id;
 387       Time    : Duration;
 388       Mode    : ST.Delay_Modes)
 389    is
 390    begin
 391       null;
 392    end Timed_Delay;
 393
 394    -----------------
 395    -- Timed_Sleep --
 396    -----------------
 397
 398    procedure Timed_Sleep
 399      (Self_ID  : Task_Id;
 400       Time     : Duration;
 401       Mode     : ST.Delay_Modes;
 402       Reason   : System.Tasking.Task_States;
 403       Timedout : out Boolean;
 404       Yielded  : out Boolean)
 405    is
 406    begin
 407       Timedout := False;
 408       Yielded := False;
 409    end Timed_Sleep;
 410
 411    ------------
 412    -- Unlock --
 413    ------------
 414
 415    procedure Unlock (L : access Lock) is
 416    begin
 417       null;
 418    end Unlock;
 419
 420    procedure Unlock (L : access RTS_Lock; Global_Lock : Boolean := False) is
 421    begin
 422       null;
 423    end Unlock;
 424
 425    procedure Unlock (T : Task_Id) is
 426    begin
 427       null;
 428    end Unlock;
 429
 430    ----------------
 431    -- Unlock_RTS --
 432    ----------------
 433
 434    procedure Unlock_RTS is
 435    begin
 436       null;
 437    end Unlock_RTS;
 438    ------------
 439    -- Wakeup --
 440    ------------
 441
 442    procedure Wakeup (T : Task_Id; Reason : System.Tasking.Task_States) is
 443    begin
 444       null;
 445    end Wakeup;
 446
 447    ----------------
 448    -- Write_Lock --
 449    ----------------
 450
 451    procedure Write_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
 452    begin
 453       Ceiling_Violation := False;
 454    end Write_Lock;
 455
 456    procedure Write_Lock
 457      (L           : access RTS_Lock;
 458       Global_Lock : Boolean := False)
 459    is
 460    begin
 461       null;
 462    end Write_Lock;
 463
 464    procedure Write_Lock (T : Task_Id) is
 465    begin
 466       null;
 467    end Write_Lock;
 468
 469    -----------
 470    -- Yield --
 471    -----------
 472
 473    procedure Yield (Do_Yield : Boolean := True) is
 474    begin
 475       null;
 476    end Yield;
 477
 478 end System.Task_Primitives.Operations;