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-------------------------------------------------------------------------------
--- --
--- 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) 1992-2009, 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 3, 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. --
--- --
--- As a special exception under Section 7 of GPL version 3, you are granted --
--- additional permissions described in the GCC Runtime Library Exception, --
--- version 3.1, as published by the Free Software Foundation. --
--- --
--- You should have received a copy of the GNU General Public License and --
--- a copy of the GCC Runtime Library Exception along with this program; --
--- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
--- <http://www.gnu.org/licenses/>. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
-with Ada.Exceptions;
-
-with System.Tasking;
-with System.Task_Primitives.Operations;
-
-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;