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) 1992-2005, 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.
44 -- used for Ada_Task_Control_Block
47 with System.Error_Reporting;
50 package body System.Task_Primitives.Operations is
53 use System.Parameters;
55 pragma Warnings (Off);
56 -- Turn off warnings since so many unreferenced parameters
59 -- Comment required here ???
65 procedure Abort_Task (T : Task_Id) is
76 function Check_Exit (Self_ID : ST.Task_Id) return Boolean is
85 function Check_No_Locks (Self_ID : 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 : access Lock) is
159 procedure Finalize_Lock (L : 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
200 procedure Initialize (S : in out Suspension_Object) is
205 ---------------------
206 -- Initialize_Lock --
207 ---------------------
209 procedure Initialize_Lock
210 (Prio : System.Any_Priority;
217 procedure Initialize_Lock (L : access RTS_Lock; Level : Lock_Level) is
226 procedure Initialize_TCB (Self_ID : Task_Id; Succeeded : out Boolean) is
235 function Is_Valid_Task return Boolean is
244 procedure Lock_RTS is
249 ---------------------
250 -- Monotonic_Clock --
251 ---------------------
253 function Monotonic_Clock return Duration is
262 function New_ATCB (Entry_Num : Task_Entry_Index) return Task_Id is
264 return new Ada_Task_Control_Block (Entry_Num);
271 procedure Read_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
273 Ceiling_Violation := False;
276 -----------------------------
277 -- Register_Foreign_Thread --
278 -----------------------------
280 function Register_Foreign_Thread return Task_Id is
283 end Register_Foreign_Thread;
291 Thread_Self : OSI.Thread_Id) return Boolean
301 function RT_Resolution return Duration is
310 function Self return Task_Id is
319 procedure Set_False (S : in out Suspension_Object) is
328 procedure Set_Priority
330 Prio : System.Any_Priority;
331 Loss_Of_Inheritance : Boolean := False)
341 procedure Set_True (S : in out Suspension_Object) is
350 procedure Sleep (Self_ID : Task_Id; Reason : System.Tasking.Task_States) is
359 procedure Stack_Guard (T : ST.Task_Id; On : Boolean) is
368 function Suspend_Task
370 Thread_Self : OSI.Thread_Id) return Boolean
376 ------------------------
377 -- Suspend_Until_True --
378 ------------------------
380 procedure Suspend_Until_True (S : in out Suspension_Object) is
383 end Suspend_Until_True;
389 procedure Timed_Delay
392 Mode : ST.Delay_Modes)
402 procedure Timed_Sleep
405 Mode : ST.Delay_Modes;
406 Reason : System.Tasking.Task_States;
407 Timedout : out Boolean;
408 Yielded : out Boolean)
419 procedure Unlock (L : access Lock) is
424 procedure Unlock (L : access RTS_Lock; Global_Lock : Boolean := False) is
429 procedure Unlock (T : Task_Id) is
438 procedure Unlock_RTS is
446 procedure Wakeup (T : Task_Id; Reason : System.Tasking.Task_States) is
455 procedure Write_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
457 Ceiling_Violation := False;
461 (L : access RTS_Lock;
462 Global_Lock : Boolean := False)
468 procedure Write_Lock (T : Task_Id) is
477 procedure Yield (Do_Yield : Boolean := True) is
483 -- Can't raise an exception because target independent packages try to
484 -- do an Abort_Defer, which gets a memory fault.
487 System.Error_Reporting.Shutdown
488 ("Tasking not implemented on this configuration");
489 end System.Task_Primitives.Operations;