435 lines
10 KiB
Ada
435 lines
10 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- 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 --
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-- --
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-- B o d y --
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-- --
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-- $Revision: 1.33 $
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-- --
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-- Copyright (C) 1991-2001, Florida State University --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNARL; see file COPYING. If not, write --
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-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. It is --
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-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
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-- State University (http://www.gnat.com). --
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-- --
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------------------------------------------------------------------------------
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-- This is a no tasking version of this package
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-- This package contains all the GNULL primitives that interface directly
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-- with the underlying OS.
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pragma Polling (Off);
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-- Turn off polling, we do not want ATC polling to take place during
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-- tasking operations. It causes infinite loops and other problems.
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with System.Tasking;
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-- used for Ada_Task_Control_Block
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-- Task_ID
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with System.OS_Primitives;
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-- used for Delay_Modes
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with System.Error_Reporting;
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-- used for Shutdown
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package body System.Task_Primitives.Operations is
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use System.Tasking;
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use System.Parameters;
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use System.OS_Primitives;
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-------------------
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-- Stack_Guard --
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-------------------
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procedure Stack_Guard (T : ST.Task_ID; On : Boolean) is
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begin
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null;
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end Stack_Guard;
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--------------------
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-- Get_Thread_Id --
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--------------------
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function Get_Thread_Id (T : ST.Task_ID) return OSI.Thread_Id is
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begin
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return OSI.Thread_Id (T.Common.LL.Thread);
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end Get_Thread_Id;
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----------
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-- Self --
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----------
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function Self return Task_ID is
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begin
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return Null_Task;
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end Self;
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---------------------
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-- Initialize_Lock --
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---------------------
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procedure Initialize_Lock
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(Prio : System.Any_Priority;
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L : access Lock)
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is
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begin
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null;
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end Initialize_Lock;
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procedure Initialize_Lock (L : access RTS_Lock; Level : Lock_Level) is
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begin
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null;
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end Initialize_Lock;
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-------------------
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-- Finalize_Lock --
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-------------------
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procedure Finalize_Lock (L : access Lock) is
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begin
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null;
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end Finalize_Lock;
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procedure Finalize_Lock (L : access RTS_Lock) is
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begin
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null;
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end Finalize_Lock;
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----------------
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-- Write_Lock --
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----------------
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procedure Write_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
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begin
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Ceiling_Violation := False;
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end Write_Lock;
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procedure Write_Lock (L : access RTS_Lock) is
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begin
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null;
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end Write_Lock;
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procedure Write_Lock (T : Task_ID) is
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begin
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null;
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end Write_Lock;
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---------------
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-- Read_Lock --
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---------------
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procedure Read_Lock (L : access Lock; Ceiling_Violation : out Boolean) is
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begin
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Ceiling_Violation := False;
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end Read_Lock;
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------------
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-- Unlock --
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------------
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procedure Unlock (L : access Lock) is
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begin
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null;
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end Unlock;
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procedure Unlock (L : access RTS_Lock) is
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begin
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null;
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end Unlock;
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procedure Unlock (T : Task_ID) is
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begin
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null;
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end Unlock;
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-------------
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-- Sleep --
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-------------
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procedure Sleep (Self_ID : Task_ID;
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Reason : System.Tasking.Task_States) is
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begin
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null;
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end Sleep;
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-----------------
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-- Timed_Sleep --
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-----------------
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procedure Timed_Sleep
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(Self_ID : Task_ID;
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Time : Duration;
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Mode : ST.Delay_Modes;
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Reason : System.Tasking.Task_States;
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Timedout : out Boolean;
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Yielded : out Boolean) is
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begin
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Timedout := False;
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Yielded := False;
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end Timed_Sleep;
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-----------------
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-- Timed_Delay --
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-----------------
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procedure Timed_Delay
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(Self_ID : Task_ID;
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Time : Duration;
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Mode : ST.Delay_Modes)
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is
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Rel_Time : Duration;
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procedure sleep (How_Long : Natural);
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pragma Import (C, sleep, "sleep");
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begin
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if Mode = Relative then
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Rel_Time := Time;
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else
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Rel_Time := Time - Monotonic_Clock;
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end if;
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if Rel_Time > 0.0 then
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sleep (Natural (Rel_Time));
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end if;
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end Timed_Delay;
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---------------------
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-- Monotonic_Clock --
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---------------------
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function Monotonic_Clock return Duration is
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begin
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return 0.0;
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end Monotonic_Clock;
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-------------------
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-- RT_Resolution --
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-------------------
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function RT_Resolution return Duration is
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begin
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return 10#1.0#E-6;
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end RT_Resolution;
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------------
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-- Wakeup --
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------------
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procedure Wakeup (T : Task_ID; Reason : System.Tasking.Task_States) is
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begin
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null;
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end Wakeup;
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------------------
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-- Set_Priority --
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------------------
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procedure Set_Priority
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(T : Task_ID;
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Prio : System.Any_Priority;
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Loss_Of_Inheritance : Boolean := False) is
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begin
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null;
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end Set_Priority;
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------------------
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-- Get_Priority --
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------------------
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function Get_Priority (T : Task_ID) return System.Any_Priority is
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begin
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return 0;
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end Get_Priority;
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----------------
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-- Enter_Task --
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----------------
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procedure Enter_Task (Self_ID : Task_ID) is
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begin
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null;
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end Enter_Task;
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--------------
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-- New_ATCB --
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--------------
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function New_ATCB (Entry_Num : Task_Entry_Index) return Task_ID is
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begin
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return new Ada_Task_Control_Block (Entry_Num);
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end New_ATCB;
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----------------------
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-- Initialize_TCB --
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----------------------
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procedure Initialize_TCB (Self_ID : Task_ID; Succeeded : out Boolean) is
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begin
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Succeeded := False;
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end Initialize_TCB;
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-----------------
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-- Create_Task --
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-----------------
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procedure Create_Task
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(T : Task_ID;
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Wrapper : System.Address;
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Stack_Size : System.Parameters.Size_Type;
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Priority : System.Any_Priority;
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Succeeded : out Boolean)
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is
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begin
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Succeeded := False;
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end Create_Task;
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------------------
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-- Finalize_TCB --
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------------------
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procedure Finalize_TCB (T : Task_ID) is
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begin
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null;
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end Finalize_TCB;
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---------------
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-- Exit_Task --
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---------------
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procedure Exit_Task is
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begin
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null;
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end Exit_Task;
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----------------
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-- Abort_Task --
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----------------
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procedure Abort_Task (T : Task_ID) is
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begin
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null;
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end Abort_Task;
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-----------
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-- Yield --
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-----------
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procedure Yield (Do_Yield : Boolean := True) is
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begin
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null;
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end Yield;
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----------------
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-- Check_Exit --
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----------------
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-- Dummy versions. The only currently working versions is for solaris
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-- (native).
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function Check_Exit (Self_ID : ST.Task_ID) return Boolean is
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begin
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return True;
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end Check_Exit;
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--------------------
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-- Check_No_Locks --
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--------------------
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function Check_No_Locks (Self_ID : ST.Task_ID) return Boolean is
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begin
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return True;
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end Check_No_Locks;
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----------------------
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-- Environment_Task --
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----------------------
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function Environment_Task return Task_ID is
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begin
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return null;
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end Environment_Task;
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-------------------------
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-- Lock_All_Tasks_List --
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-------------------------
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procedure Lock_All_Tasks_List is
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begin
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null;
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end Lock_All_Tasks_List;
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---------------------------
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-- Unlock_All_Tasks_List --
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---------------------------
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procedure Unlock_All_Tasks_List is
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begin
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null;
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end Unlock_All_Tasks_List;
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------------------
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-- Suspend_Task --
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------------------
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function Suspend_Task
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(T : ST.Task_ID;
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Thread_Self : OSI.Thread_Id) return Boolean is
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begin
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return False;
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end Suspend_Task;
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-----------------
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-- Resume_Task --
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-----------------
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function Resume_Task
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(T : ST.Task_ID;
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Thread_Self : OSI.Thread_Id) return Boolean is
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begin
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return False;
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end Resume_Task;
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----------------
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-- Initialize --
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----------------
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procedure Initialize (Environment_Task : Task_ID) is
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begin
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null;
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end Initialize;
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No_Tasking : Boolean;
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begin
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-- Can't raise an exception because target independent packages try to
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-- do an Abort_Defer, which gets a memory fault.
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No_Tasking :=
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System.Error_Reporting.Shutdown
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("Tasking not implemented on this configuration");
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end System.Task_Primitives.Operations;
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