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------------------------------------------------------------------------------
-- --
-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- 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 --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 1992-2001, Free Software Foundation, Inc. --
-- --
-- GNARL is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
-- OUT 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 GNARL; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, 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. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. It is --
-- now maintained by Ada Core Technologies, Inc. (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- This is a no tasking version of this package
-- This package contains all the GNULL primitives that interface directly
-- with the underlying OS.
pragma Polling (Off);
-- Turn off polling, we do not want ATC polling to take place during
-- tasking operations. It causes infinite loops and other problems.
with System.Tasking;
-- used for Ada_Task_Control_Block
-- Task_ID
with System.Error_Reporting;
-- used for Shutdown
package body System.Task_Primitives.Operations is
use System.Tasking;
use System.Parameters;
-----------------
-- Stack_Guard --
-----------------
procedure Stack_Guard (T : ST.Task_ID; On : Boolean) is
begin
null;
end Stack_Guard;
--------------------
-- Get_Thread_Id --
--------------------
function Get_Thread_Id (T : ST.Task_ID) return OSI.Thread_Id is
begin
return OSI.Thread_Id (T.Common.LL.Thread);
end Get_Thread_Id;
----------
-- Self --
----------
function Self return Task_ID is
begin
return Null_Task;
end Self;
---------------------
-- Initialize_Lock --
---------------------
procedure Initialize_Lock
(Prio : System.Any_Priority;
L : access Lock) is
begin
null;
end Initialize_Lock;
procedure Initialize_Lock (L : access RTS_Lock; Level : Lock_Level) is
begin
null;
end Initialize_Lock;
-------------------
-- Finalize_Lock --
-------------------
procedure Finalize_Lock (L : access Lock) is
begin
null;
end Finalize_Lock;
procedure Finalize_Lock (L : access RTS_Lock) is
begin
null;
end Finalize_Lock;
----------------
-- Write_Lock --
----------------
procedure Write_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
begin
Ceiling_Violation := False;
end Write_Lock;
procedure Write_Lock
(L : access RTS_Lock; Global_Lock : Boolean := False)
is
begin
null;
end Write_Lock;
procedure Write_Lock (T : Task_ID) is
begin
null;
end Write_Lock;
---------------
-- Read_Lock --
---------------
procedure Read_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
begin
Ceiling_Violation := False;
end Read_Lock;
------------
-- Unlock --
------------
procedure Unlock (L : access Lock) is
begin
null;
end Unlock;
procedure Unlock (L : access RTS_Lock; Global_Lock : Boolean := False) is
begin
null;
end Unlock;
procedure Unlock (T : Task_ID) is
begin
null;
end Unlock;
-----------
-- Sleep --
-----------
procedure Sleep (Self_ID : Task_ID; Reason : System.Tasking.Task_States) is
begin
null;
end Sleep;
-----------------
-- Timed_Sleep --
-----------------
procedure Timed_Sleep
(Self_ID : Task_ID;
Time : Duration;
Mode : ST.Delay_Modes;
Reason : System.Tasking.Task_States;
Timedout : out Boolean;
Yielded : out Boolean) is
begin
Timedout := False;
Yielded := False;
end Timed_Sleep;
-----------------
-- Timed_Delay --
-----------------
procedure Timed_Delay
(Self_ID : Task_ID;
Time : Duration;
Mode : ST.Delay_Modes) is
begin
null;
end Timed_Delay;
---------------------
-- Monotonic_Clock --
---------------------
function Monotonic_Clock return Duration is
begin
return 0.0;
end Monotonic_Clock;
-------------------
-- RT_Resolution --
-------------------
function RT_Resolution return Duration is
begin
return 10#1.0#E-6;
end RT_Resolution;
------------
-- Wakeup --
------------
procedure Wakeup (T : Task_ID; Reason : System.Tasking.Task_States) is
begin
null;
end Wakeup;
------------------
-- Set_Priority --
------------------
procedure Set_Priority
(T : Task_ID;
Prio : System.Any_Priority;
Loss_Of_Inheritance : Boolean := False) is
begin
null;
end Set_Priority;
------------------
-- Get_Priority --
------------------
function Get_Priority (T : Task_ID) return System.Any_Priority is
begin
return 0;
end Get_Priority;
----------------
-- Enter_Task --
----------------
procedure Enter_Task (Self_ID : Task_ID) is
begin
null;
end Enter_Task;
--------------
-- New_ATCB --
--------------
function New_ATCB (Entry_Num : Task_Entry_Index) return Task_ID is
begin
return new Ada_Task_Control_Block (Entry_Num);
end New_ATCB;
----------------------
-- Initialize_TCB --
----------------------
procedure Initialize_TCB (Self_ID : Task_ID; Succeeded : out Boolean) is
begin
Succeeded := False;
end Initialize_TCB;
-----------------
-- Create_Task --
-----------------
procedure Create_Task
(T : Task_ID;
Wrapper : System.Address;
Stack_Size : System.Parameters.Size_Type;
Priority : System.Any_Priority;
Succeeded : out Boolean) is
begin
Succeeded := False;
end Create_Task;
------------------
-- Finalize_TCB --
------------------
procedure Finalize_TCB (T : Task_ID) is
begin
null;
end Finalize_TCB;
---------------
-- Exit_Task --
---------------
procedure Exit_Task is
begin
null;
end Exit_Task;
----------------
-- Abort_Task --
----------------
procedure Abort_Task (T : Task_ID) is
begin
null;
end Abort_Task;
-----------
-- Yield --
-----------
procedure Yield (Do_Yield : Boolean := True) is
begin
null;
end Yield;
----------------
-- Check_Exit --
----------------
-- Dummy versions. The only currently working versions is for solaris
-- (native).
function Check_Exit (Self_ID : ST.Task_ID) return Boolean is
begin
return True;
end Check_Exit;
--------------------
-- Check_No_Locks --
--------------------
function Check_No_Locks (Self_ID : ST.Task_ID) return Boolean is
begin
return True;
end Check_No_Locks;
----------------------
-- Environment_Task --
----------------------
function Environment_Task return Task_ID is
begin
return null;
end Environment_Task;
--------------
-- Lock_RTS --
--------------
procedure Lock_RTS is
begin
null;
end Lock_RTS;
----------------
-- Unlock_RTS --
----------------
procedure Unlock_RTS is
begin
null;
end Unlock_RTS;
------------------
-- Suspend_Task --
------------------
function Suspend_Task
(T : ST.Task_ID;
Thread_Self : OSI.Thread_Id) return Boolean is
begin
return False;
end Suspend_Task;
-----------------
-- Resume_Task --
-----------------
function Resume_Task
(T : ST.Task_ID;
Thread_Self : OSI.Thread_Id) return Boolean is
begin
return False;
end Resume_Task;
----------------
-- Initialize --
----------------
procedure Initialize (Environment_Task : Task_ID) is
begin
null;
end Initialize;
No_Tasking : Boolean;
begin
-- Can't raise an exception because target independent packages try to
-- do an Abort_Defer, which gets a memory fault.
No_Tasking :=
System.Error_Reporting.Shutdown
("Tasking not implemented on this configuration");
end System.Task_Primitives.Operations;
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