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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- E X P _ S M E M --
+-- --
+-- S p e c --
+-- --
+-- Copyright (C) 1998-2008, 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. 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 COPYING3. If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license. --
+-- --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
+-- --
+------------------------------------------------------------------------------
+
+-- 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.
+
+ function Make_Shared_Var_Procs (N : Node_Id) return Node_Id;
+ -- N is the node for the declaration of a shared passive variable.
+ -- This procedure constructs an instantiation of
+ -- System.Shared_Storage.Shared_Var_Procs that contains 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. The last inserted node is returned.
+
+end Exp_Smem;