--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnarl/s-tpopsp__vxworks-tls.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,99 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--                SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC                --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--         Copyright (C) 1992-2017, 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/>.                                          --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University.       --
+-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is a VxWorks version of this package using Thread_Local_Storage
+--  support (VxWorks 6.6 and higher). The implementation is based on __threads
+--  support.
+
+separate (System.Task_Primitives.Operations)
+package body Specific is
+
+   ATCB : aliased Task_Id := null;
+   --  Ada Task_Id associated with a thread
+   pragma Thread_Local_Storage (ATCB);
+
+   ----------------
+   -- Initialize --
+   ----------------
+
+   procedure Initialize is
+   begin
+      null;
+   end Initialize;
+
+   -------------------
+   -- Is_Valid_Task --
+   -------------------
+
+   function Is_Valid_Task return Boolean is
+   begin
+      return ATCB /= Null_Task;
+   end Is_Valid_Task;
+
+   ---------
+   -- Set --
+   ---------
+
+   procedure Set (Self_Id : Task_Id) is
+   begin
+      ATCB := Self_Id;
+   end Set;
+
+   ----------
+   -- Self --
+   ----------
+
+   --  To make Ada tasks and C threads interoperate better, we have added some
+   --  functionality to Self. Suppose a C main program (with threads) calls an
+   --  Ada procedure and the Ada procedure calls the tasking runtime system.
+   --  Eventually, a call will be made to self. Since the call is not coming
+   --  from an Ada task, there will be no corresponding ATCB.
+
+   --  What we do in Self is to catch references that do not come from
+   --  recognized Ada tasks, and create an ATCB for the calling thread.
+
+   --  The new ATCB will be "detached" from the normal Ada task master
+   --  hierarchy, much like the existing implicitly created signal-server
+   --  tasks.
+
+   function Self return Task_Id is
+      Result : constant Task_Id := ATCB;
+   begin
+      if Result /= null then
+         return Result;
+      else
+         --  If the value is Null then it is a non-Ada task
+
+         return Register_Foreign_Thread;
+      end if;
+   end Self;
+
+end Specific;