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Diffstat (limited to 'gcc/ada/a-sytaco.adb')
| -rw-r--r-- | gcc/ada/a-sytaco.adb | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/gcc/ada/a-sytaco.adb b/gcc/ada/a-sytaco.adb new file mode 100644 index 00000000000..e99ea6e0866 --- /dev/null +++ b/gcc/ada/a-sytaco.adb @@ -0,0 +1,132 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 -- +-- -- +-- $Revision: 1.9 $ +-- -- +-- 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. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + + +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; |