------------------------------------------------------------------------------ -- -- -- 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;