+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
--- --
--- S Y S T E M . T A S K I N G . P R O T E C T E D _ O B J E C T S --
--- --
--- B o d y --
--- --
--- $Revision: 1.2 $
--- --
--- Copyright (C) 1991-2001 Florida State University --
--- --
--- GNARL 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. GNARL 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 GNARL; 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. --
--- --
--- GNARL was developed by the GNARL team at Florida State University. It is --
--- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
--- State University (http://www.gnat.com). --
--- --
-------------------------------------------------------------------------------
-
-pragma Polling (Off);
--- Turn off polling, we do not want ATC polling to take place during
--- tasking operations. It causes infinite loops and other problems.
-
-with System.Task_Primitives.Operations;
--- used for Write_Lock
--- Unlock
-
-package body System.Tasking.Protected_Objects is
-
- use System.Task_Primitives.Operations;
-
- -------------------------
- -- Finalize_Protection --
- -------------------------
-
- procedure Finalize_Protection (Object : in out Protection) is
- begin
- Finalize_Lock (Object.L'Unrestricted_Access);
- end Finalize_Protection;
-
- ---------------------------
- -- Initialize_Protection --
- ---------------------------
-
- procedure Initialize_Protection
- (Object : Protection_Access;
- Ceiling_Priority : Integer)
- is
- Init_Priority : Integer := Ceiling_Priority;
- begin
- if Init_Priority = Unspecified_Priority then
- Init_Priority := System.Priority'Last;
- end if;
-
- Initialize_Lock (Init_Priority, Object.L'Access);
- Object.Ceiling := System.Any_Priority (Init_Priority);
- end Initialize_Protection;
-
- ----------
- -- Lock --
- ----------
-
- procedure Lock (Object : Protection_Access) is
- Ceiling_Violation : Boolean;
- begin
- -- The lock is made without defering abortion.
-
- -- Therefore the abortion has to be deferred before calling this
- -- routine. This means that the compiler has to generate a Defer_Abort
- -- call before the call to Lock.
-
- -- The caller is responsible for undeferring abortion, and compiler
- -- generated calls must be protected with cleanup handlers to ensure
- -- that abortion is undeferred in all cases.
-
- Write_Lock (Object.L'Access, Ceiling_Violation);
-
- if Ceiling_Violation then
- raise Program_Error;
- end if;
- end Lock;
-
- --------------------
- -- Lock_Read_Only --
- --------------------
-
- procedure Lock_Read_Only (Object : Protection_Access) is
- Ceiling_Violation : Boolean;
- begin
- Read_Lock (Object.L'Access, Ceiling_Violation);
-
- if Ceiling_Violation then
- raise Program_Error;
- end if;
- end Lock_Read_Only;
-
- ------------
- -- Unlock --
- ------------
-
- procedure Unlock (Object : Protection_Access) is
- begin
- Unlock (Object.L'Access);
- end Unlock;
-
-end System.Tasking.Protected_Objects;
projects / msp430-gcc.git / blobdiff