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Diffstat (limited to 'gcc-4.3.1/gcc/ada/a-sytaco.adb')
| -rw-r--r-- | gcc-4.3.1/gcc/ada/a-sytaco.adb | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/gcc-4.3.1/gcc/ada/a-sytaco.adb b/gcc-4.3.1/gcc/ada/a-sytaco.adb new file mode 100644 index 000000000..3d0aaaa8c --- /dev/null +++ b/gcc-4.3.1/gcc/ada/a-sytaco.adb @@ -0,0 +1,116 @@ +------------------------------------------------------------------------------ +-- -- +-- 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; |