------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME 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) 1992-2005, 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, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, 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. -- -- -- ------------------------------------------------------------------------------ with System.Tasking; -- Used for Detect_Blocking -- Self with Ada.Exceptions; -- Used for Raise_Exception with System.Task_Primitives.Operations; -- Used for Initialize -- Finalize -- Current_State -- Set_False -- Set_True -- Suspend_Until_True package body Ada.Synchronous_Task_Control is ---------------- -- Initialize -- ---------------- procedure Initialize (S : in out Suspension_Object) is begin System.Task_Primitives.Operations.Initialize (S.SO); end Initialize; -------------- -- Finalize -- -------------- procedure Finalize (S : in out Suspension_Object) is begin System.Task_Primitives.Operations.Finalize (S.SO); end Finalize; ------------------- -- Current_State -- ------------------- function Current_State (S : Suspension_Object) return Boolean is begin return System.Task_Primitives.Operations.Current_State (S.SO); end Current_State; --------------- -- Set_False -- --------------- procedure Set_False (S : in out Suspension_Object) is begin System.Task_Primitives.Operations.Set_False (S.SO); end Set_False; -------------- -- Set_True -- -------------- procedure Set_True (S : in out Suspension_Object) is begin System.Task_Primitives.Operations.Set_True (S.SO); end Set_True; ------------------------ -- Suspend_Until_True -- ------------------------ procedure Suspend_Until_True (S : in out Suspension_Object) is begin -- This is a potentially blocking (see ARM D.10, par. 10), so that -- if pragma Detect_Blocking is active then Program_Error must be -- raised if this operation is called from a protected action. if System.Tasking.Detect_Blocking and then System.Tasking.Self.Common.Protected_Action_Nesting > 0 then Ada.Exceptions.Raise_Exception (Program_Error'Identity, "potentially blocking operation"); end if; System.Task_Primitives.Operations.Suspend_Until_True (S.SO); end Suspend_Until_True; end Ada.Synchronous_Task_Control;