1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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 --
9 -- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
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. --
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. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This is a no tasking version of this package
36 -- This package contains all the GNULL primitives that interface directly
37 -- with the underlying OS.
40 -- Turn off polling, we do not want ATC polling to take place during
41 -- tasking operations. It causes infinite loops and other problems.
43 with System.Error_Reporting;
46 package body System.Task_Primitives.Operations is
49 use System.Parameters;
51 pragma Warnings (Off);
52 -- Turn off warnings since so many unreferenced parameters
58 procedure Abort_Task (T : Task_Id) is
67 function Check_Exit (Self_ID : ST.Task_Id) return Boolean is
76 function Check_No_Locks (Self_ID : ST.Task_Id) return Boolean is
85 function Continue_Task (T : ST.Task_Id) return Boolean is
94 function Current_State (S : Suspension_Object) return Boolean is
99 ----------------------
100 -- Environment_Task --
101 ----------------------
103 function Environment_Task return Task_Id is
106 end Environment_Task;
112 procedure Create_Task
114 Wrapper : System.Address;
115 Stack_Size : System.Parameters.Size_Type;
116 Priority : System.Any_Priority;
117 Succeeded : out Boolean)
127 procedure Enter_Task (Self_ID : Task_Id) is
136 procedure Exit_Task is
145 procedure Finalize (S : in out Suspension_Object) is
154 procedure Finalize_Lock (L : not null access Lock) is
159 procedure Finalize_Lock (L : not null access RTS_Lock) is
168 procedure Finalize_TCB (T : Task_Id) is
177 function Get_Priority (T : Task_Id) return System.Any_Priority is
186 function Get_Thread_Id (T : ST.Task_Id) return OSI.Thread_Id is
188 return OSI.Thread_Id (T.Common.LL.Thread);
195 procedure Initialize (Environment_Task : Task_Id) is
196 No_Tasking : Boolean;
199 System.Error_Reporting.Shutdown
200 ("Tasking not implemented on this configuration");
203 procedure Initialize (S : in out Suspension_Object) is
208 ---------------------
209 -- Initialize_Lock --
210 ---------------------
212 procedure Initialize_Lock
213 (Prio : System.Any_Priority;
214 L : not null access Lock)
220 procedure Initialize_Lock
221 (L : not null access RTS_Lock; Level : Lock_Level) is
230 procedure Initialize_TCB (Self_ID : Task_Id; Succeeded : out Boolean) is
239 function Is_Valid_Task return Boolean is
248 procedure Lock_RTS is
253 ---------------------
254 -- Monotonic_Clock --
255 ---------------------
257 function Monotonic_Clock return Duration is
266 function New_ATCB (Entry_Num : Task_Entry_Index) return Task_Id is
268 return new Ada_Task_Control_Block (Entry_Num);
276 (L : not null access Lock;
277 Ceiling_Violation : out Boolean)
280 Ceiling_Violation := False;
283 -----------------------------
284 -- Register_Foreign_Thread --
285 -----------------------------
287 function Register_Foreign_Thread return Task_Id is
290 end Register_Foreign_Thread;
298 Thread_Self : OSI.Thread_Id) return Boolean
308 function RT_Resolution return Duration is
317 function Self return Task_Id is
326 procedure Set_Ceiling
327 (L : not null access Lock;
328 Prio : System.Any_Priority)
338 procedure Set_False (S : in out Suspension_Object) is
347 procedure Set_Priority
349 Prio : System.Any_Priority;
350 Loss_Of_Inheritance : Boolean := False)
360 procedure Set_True (S : in out Suspension_Object) is
369 procedure Sleep (Self_ID : Task_Id; Reason : System.Tasking.Task_States) is
378 procedure Stack_Guard (T : ST.Task_Id; On : Boolean) is
387 function Suspend_Task
389 Thread_Self : OSI.Thread_Id) return Boolean
399 procedure Stop_All_Tasks is
408 function Stop_Task (T : ST.Task_Id) return Boolean is
409 pragma Unreferenced (T);
414 ------------------------
415 -- Suspend_Until_True --
416 ------------------------
418 procedure Suspend_Until_True (S : in out Suspension_Object) is
421 end Suspend_Until_True;
427 procedure Timed_Delay
430 Mode : ST.Delay_Modes)
440 procedure Timed_Sleep
443 Mode : ST.Delay_Modes;
444 Reason : System.Tasking.Task_States;
445 Timedout : out Boolean;
446 Yielded : out Boolean)
457 procedure Unlock (L : not null access Lock) is
463 (L : not null access RTS_Lock;
464 Global_Lock : Boolean := False)
470 procedure Unlock (T : Task_Id) is
479 procedure Unlock_RTS is
487 procedure Wakeup (T : Task_Id; Reason : System.Tasking.Task_States) is
497 (L : not null access Lock;
498 Ceiling_Violation : out Boolean)
501 Ceiling_Violation := False;
505 (L : not null access RTS_Lock;
506 Global_Lock : Boolean := False)
512 procedure Write_Lock (T : Task_Id) is
521 procedure Yield (Do_Yield : Boolean := True) is
526 end System.Task_Primitives.Operations;