blob: 363c3971f933c8755c4bf37c6690bf4acc679ab7 [file] [log] [blame]
-- --
-- --
-- E X P _ S M E M --
-- --
-- S p e c --
-- --
-- Copyright (C) 1998-2018, 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 --
-- 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 a transient scope
-- and acquiring the appropriate 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;