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------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- A D A . S Y N C H R O N O U S _ T A S K _ C O N T R O L --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
-- --
-- GNAT 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. GNAT 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 GNAT; 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
package body Ada.Synchronous_Task_Control is
-------------------
-- Suspension_PO --
-------------------
protected body Suspension_Object is
--------------
-- Get_Open --
--------------
function Get_Open return Boolean is
begin
return Open;
end Get_Open;
---------------
-- Set_False --
---------------
procedure Set_False is
begin
Open := False;
end Set_False;
--------------
-- Set_True --
--------------
procedure Set_True is
begin
Open := True;
end Set_True;
----------
-- Wait --
----------
entry Wait when Open is
begin
Open := False;
end Wait;
--------------------
-- Wait_Exception --
--------------------
entry Wait_Exception when True is
begin
if Wait'Count /= 0 then
raise Program_Error;
end if;
requeue Wait;
end Wait_Exception;
end Suspension_Object;
-------------------
-- Current_State --
-------------------
function Current_State (S : Suspension_Object) return Boolean is
begin
return S.Get_Open;
end Current_State;
---------------
-- Set_False --
---------------
procedure Set_False (S : in out Suspension_Object) is
begin
S.Set_False;
end Set_False;
--------------
-- Set_True --
--------------
procedure Set_True (S : in out Suspension_Object) is
begin
S.Set_True;
end Set_True;
------------------------
-- Suspend_Until_True --
------------------------
procedure Suspend_Until_True (S : in out Suspension_Object) is
begin
S.Wait_Exception;
end Suspend_Until_True;
end Ada.Synchronous_Task_Control;
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