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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2011, Free Software Foundation, Inc. --
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-- --
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-- GNARL is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is a VxWorks version of this package where foreign threads are
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-- recognized. The implementation is based on VxWorks taskVarLib.
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separate (System.Task_Primitives.Operations)
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package body Specific is
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ATCB_Key : aliased System.Address := System.Null_Address;
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-- Key used to find the Ada Task_Id associated with a thread
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ATCB_Key_Addr : System.Address := ATCB_Key'Address;
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pragma Export (Ada, ATCB_Key_Addr, "__gnat_ATCB_key_addr");
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-- Exported to support the temporary AE653 task registration
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-- implementation. This mechanism is used to minimize impact on other
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-- targets.
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----------------
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-- Initialize --
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----------------
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procedure Initialize is
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begin
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null;
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end Initialize;
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-------------------
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-- Is_Valid_Task --
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-------------------
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function Is_Valid_Task return Boolean is
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begin
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return taskVarGet (taskIdSelf, ATCB_Key'Access) /= ERROR;
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end Is_Valid_Task;
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---------
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-- Set --
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---------
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procedure Set (Self_Id : Task_Id) is
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Result : STATUS;
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begin
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-- If argument is null, destroy task specific data, to make API
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-- consistent with other platforms, and thus compatible with the
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-- shared version of s-tpoaal.adb.
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if Self_Id = null then
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Result := taskVarDelete (taskIdSelf, ATCB_Key'Access);
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pragma Assert (Result /= ERROR);
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return;
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end if;
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if taskVarGet (0, ATCB_Key'Access) = ERROR then
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Result := taskVarAdd (0, ATCB_Key'Access);
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pragma Assert (Result = OK);
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end if;
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ATCB_Key := To_Address (Self_Id);
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end Set;
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----------
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-- Self --
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----------
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function Self return Task_Id is
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begin
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return To_Task_Id (ATCB_Key);
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end Self;
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end Specific;
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