--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnarl/s-tasque.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,99 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--                 S Y S T E M . T A S K I N G . Q U E U I N G              --
+--                                                                          --
+--                                  S p e c                                 --
+--                                                                          --
+--         Copyright (C) 1992-2017, Free Software Foundation, Inc.          --
+--                                                                          --
+-- 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 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.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with System.Tasking.Protected_Objects.Entries;
+
+package System.Tasking.Queuing is
+
+   package POE renames System.Tasking.Protected_Objects.Entries;
+
+   procedure Broadcast_Program_Error
+     (Self_ID      : Task_Id;
+      Object       : POE.Protection_Entries_Access;
+      Pending_Call : Entry_Call_Link;
+      RTS_Locked   : Boolean := False);
+   --  Raise Program_Error in all tasks calling the protected entries of Object
+   --  The exception will not be raised immediately for the calling task; it
+   --  will be deferred until it calls Check_Exception.
+   --  RTS_Locked indicates whether the global RTS lock is taken (only
+   --  relevant if Single_Lock is True).
+
+   procedure Enqueue (E : in out Entry_Queue; Call : Entry_Call_Link);
+   --  Enqueue Call at the end of entry_queue E
+
+   procedure Dequeue (E : in out Entry_Queue; Call : Entry_Call_Link);
+   --  Dequeue Call from entry_queue E
+
+   function Head (E : Entry_Queue) return Entry_Call_Link;
+   pragma Inline (Head);
+   --  Return the head of entry_queue E
+
+   procedure Dequeue_Head
+     (E    : in out Entry_Queue;
+      Call : out Entry_Call_Link);
+   --  Remove and return the head of entry_queue E
+
+   function Onqueue (Call : Entry_Call_Link) return Boolean;
+   pragma Inline (Onqueue);
+   --  Return True if Call is on any entry_queue at all
+
+   function Count_Waiting (E : Entry_Queue) return Natural;
+   --  Return number of calls on the waiting queue of E
+
+   procedure Select_Task_Entry_Call
+     (Acceptor         : Task_Id;
+      Open_Accepts     : Accept_List_Access;
+      Call             : out Entry_Call_Link;
+      Selection        : out Select_Index;
+      Open_Alternative : out Boolean);
+   --  Select an entry for rendezvous.  On exit:
+   --    Call will contain a pointer to the entry call record selected;
+   --    Selection will contain the index of the alternative selected
+   --    Open_Alternative will be True if there were any open alternatives
+
+   procedure Select_Protected_Entry_Call
+     (Self_ID : Task_Id;
+      Object  : POE.Protection_Entries_Access;
+      Call    : out Entry_Call_Link);
+   --  Select an entry of a protected object
+
+   procedure Enqueue_Call (Entry_Call : Entry_Call_Link);
+   procedure Dequeue_Call (Entry_Call : Entry_Call_Link);
+   --  Enqueue (dequeue) the call to (from) whatever server they are
+   --  calling, whether a task or a protected object.
+
+   procedure Requeue_Call_With_New_Prio
+     (Entry_Call : Entry_Call_Link; Prio : System.Any_Priority);
+   --  Change Priority of the call and re insert to the queue when priority
+   --  queueing is in effect. When FIFO is enforced, this routine
+   --  should not have any effect.
+
+end System.Tasking.Queuing;