New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45954 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             E X P _ S M E M                              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.3 $                              --
+--                                                                          --
+--           Copyright (C) 1998-2000, 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,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, USA.                                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains routines involved in the required expansions for
+--  handling shared memory accesses for variables in Shared_Passive packages.
+
+--  See detailed documentation in System.Shared_Storage spec for a full
+--  description of the approach that is taken for handling distributed
+--  shared memory. This expansion unit in the compiler is responsible
+--  for generating the calls to routines in System.Shared_Storage.
+
+with Types; use Types;
+package Exp_Smem is
+
+   procedure Expand_Shared_Passive_Variable (N : Node_Id);
+   --  N is the identifier for a shared passive variable. This routine is
+   --  responsible for determining if this is an assigned to N, or a
+   --  reference to N, and generating the required calls to the shared
+   --  memory read/write procedures.
+
+   procedure Add_Shared_Var_Lock_Procs (N : Node_Id);
+   --  The argument is a protected subprogram call, before it is rewritten
+   --  by Exp_Ch9.Build_Protected_Subprogram_Call. This routine, which is
+   --  called only in the case of an external call to a protected object
+   --  that has Is_Shared_Passive set, deals with installing the required
+   --  global lock calls for this case. It also generates the necessary
+   --  read/write calls for the protected object within the lock region.
+
+   procedure Make_Shared_Var_Procs (N : Node_Id);
+   --  N is the node for the declaration of a shared passive variable. This
+   --  procedure constructs and inserts the read and assignment procedures
+   --  for the shared memory variable. See System.Shared_Storage for a full
+   --  description of these procedures and how they are used.
+
+end Exp_Smem;